The probability that X lies in the interval [3, 6] is given by:P(3 ≤ X ≤ 6) = ∫3 6f(x)dx.
Suppose we have a continuous random variable that varies from 0 to 15.
To find the probability that the random variable takes on a value in the interval [3,6], we must first calculate the area under the curve within the given interval.
This is accomplished by calculating the integral of the probability density function (PDF) of the random variable, between the two endpoints of the interval. The resulting value is the probability that the random variable takes on a value within the given interval.
To begin, let's consider the probability density function (PDF) of the random variable, f(x), which is the function that describes the likelihood that the random variable will take on any given value within its range. The PDF will be a continuous function that has a positive value for all values of x between 0 and 15, and the area under the PDF will be equal to 1, indicating that the sum of all possible values of the random variable will be 1.
We can then calculate the area under the PDF between the two endpoints of the interval [3,6], which can be represented as the integral of the PDF, f(x), from 3 to 6. This can be written as the following equation: Probability of random variable in interval [3,6] = ∫36f(x)dx.
This integral represents the area under the PDF of the random variable between the two endpoints of the interval, and its value will be the probability that the random variable takes on a value within the given interval.
OR- Given the continuous random variable varies from 0 to 15, and we have to find the probability that the random variable takes on a value in the interval [3,6]. So, let's proceed step by step.What is a continuous random variable?A continuous random variable is a variable that takes on any value within a specified range of values.
In other words, any value within the range of values can occur. Continuous random variables can be measured, such as weight, height, time, and distance. Continuous random variables can't be counted, such as the number of heads in 20 coin flips or the number of cars in a parking lot, and so on.
The probability of a continuous random variable is the area under the probability density function (PDF) that falls in the interval of interest. The probability density function (PDF) must be non-negative and integrate to 1.0 over the whole domain.
Suppose we have a probability density function (PDF) f(x) for a continuous random variable X with support S, and we want to calculate the probability that X lies in the interval [a, b], where a and b are any two numbers in S, and a ≤ b. To compute the probability, we find the area under the PDF between a and b. This is given by the integral of the PDF f(x) over the interval [a, b].
Therefore, the probability that X lies in the interval [a, b] is given by:P(a ≤ X ≤ b) = ∫a bf(x)dx Suppose we want to calculate the probability that the random variable X takes on a value in the interval [3, 6].
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Find the area of the trapezoid to the nearest tenth.
PLS HELP ITS URGENT
AND THIS IS GEOMETRY
Area of the given trapezoid is 1.8m²
What is trapezoid?A trapezoid is a polygon having four sides, two of which are parallel and two of which are not. The bases and legs of the trapezoid are known as the parallel and non-parallel sides, respectively. The height or altitude of the trapezoid is defined as the distance between the bases.
The formula, which may be used to determine a trapezoid's area,
[tex]A= \frac{a+b}{2}h[/tex]
where, a and b are the lengths of the two bases and h is the height between two bases.
Given in the trapezoid figure, a= 2, b= 0.9, h is the base upper triangle.
We use the following trigonometric relationship to find the base of the upper triangle,
Apply sine rule in upper triangle with connecting line h.
Sin 45° = [tex]\frac{h}{1.8}[/tex]
h = 1.8 × Sin 45°
h = 1.8 × 0.707
h = 1.273m
Then, the area of trapezoid:
[tex]A= \frac{a+b}{2}h= \frac{2+0.9}{2}*h[/tex]
[tex]A= \frac{2.9}{2}*1.273[/tex]
A = 1.845m²
Therefore, the area of the trapezoid to the nearest tenth is 1.8m²
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The cost of 4 chairs is the same as the cost of 3 tables. If the
cost of one chair is Rs. 48, find the cost of one table.
Answer: 64 Rs
Step-by-step explanation:
Let x be the number of tables
4 x 48 = 3x
192 = 3x
x = 64
You pay $3.00 to play. The dealer deals you one card. If it is a spade, you get $10. If it is anything else,
you lose your money. Is this game fair?
The game is fair in the sense that the expected value is not negative.
What is expected value?The expected value serves as a gauge for a random variable's typical value. It is determined by multiplying each of the variables' potential outcomes by its corresponding probability, then adding the resulting products. In order to comprehend the typical outcome of a random process and determine if a given course of action is likely to be lucrative or not, the expected value is a valuable tool in decision-making.
The probability of getting a spade is 13/52 or 1/4.
The probability of getting anything else is 3/4.
he expected value of playing the game can be calculated as:
Expected value = (probability of winning x amount won) - (probability of losing x amount lost)
Expected value = (1/4 x $10) - (3/4 x $3)
Expected value = $2.50 - $2.25
Expected value = $0.25
Since the expected value is positive, this means that on average, you can expect to win $0.25 for every time you play the game.
Hence, game is fair in the sense that the expected value is not negative.
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Mr. champion storage container is 4 feet long 3 feet wide and 7 feet tall can fit 88 boxes that each has a volume of 1 ft.³ in his container explain your answer
Answer:
because 7*3*4 is 88 ft^3
Glenn has 2/5 of a granola bar. If he eats 7/8 of it, how much of the granola bar is left.
Glenn has 1/20 of the granola bar left.
How to find?
If Glenn has 2/5 of a granola bar and eats 7/8 of it, we need to find out how much is left.
First, we need to find out how much Glenn ate. To do this, we can multiply the fraction of the granola bar that Glenn had (2/5) by the fraction that he ate (7/8):
2/5 × 7/8 = (27)/(58) = 14/40
Simplifying this fraction, we get:
14/40 = 7/20
So, Glenn ate 7/20 of the granola bar.
To find out how much is left, we can subtract the fraction that he ate from the fraction that he had:
2/5 - 7/20
To subtract these fractions, we need to find a common denominator. The least common multiple of 5 and 20 is 20, so we can convert both fractions to have a denominator of 20:
2/5 = 8/20
7/20 = 7/20
Now we can subtract the fractions:
8/20 - 7/20 = 1/20
So, Glenn has 1/20 of the granola bar left.
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Let S = {-4, 0, 2, 3}. A new sequence of numbers is formed by repeating the numbers in S, IN ORDER from lowest to highest, until 80 numbers have been listed in the new sequence, i. E. , NEW_SEQUENCE = {-4, 0, 2, 3, -4, 0, 2, 3,. }. What is the sum of the first 31 terms in the new sequence?
The sum of the first 31 terms in the new sequence is 5.
Let S = {-4, 0, 2, 3}
New Sequence = {-4, 0, 2, 3, -4, 0, 2, 3, -4, 0, 2, 3, ...............}
The four terms are repeatedly separated, as we can see above. Below are some of the first four terms = -4 + 0 + 2 + 3 = 1
Now, first four terms sum = 1
Next four terms sum = 1.
So sum of first 28 terms is given as
1 + 1 + 1 + 1 + 1 + 1 + 1 = 7
Now we find sum of first 31 terms = 7 - 4 + 0 + 2 = 5
So, sum of first 31 terms of new sequence {-4, 0, 2, 3, -4, 0, 2, 3, -4, 0, 2, 3, ...............} is 5.
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A city is building a new pool. A scale drawing of the pool is shown below.
Scale,
1 in: 3 ft
What is the area, in square feet, of the pool?
4 in.
A.16n
B.24n
C.48n
D.144n
After answering the provided question, we can conclude that As a result, expression the answer is D. 144n.
what is expression ?In mathematics, an expression is a collection of symbols, digits, and companies that portray a statistical correlation or formula. An expression can be a single number, a mutable, or a combination of both of them. Addition, subtraction, proliferation, division, and exponentiation are examples of mathematical operators. Expressions are used extensively in mathematics, including arithmetic, calculus, and geometry. They are used in mathematical formula representation, equation solution, and mathematical relationship simplification.
According to the scale, 1 inch on the drawing equals 3 feet in real life. As a result, the pool's length is 4 inches x 3 feet/inch = 12 feet. Similarly, the pool's width is 4 inches x 3 feet/inch = 12 feet.
As a result, the pool's area equals the length multiplied by the width, which is:
144 square feet = 12 feet x 12 feet.
As a result, the answer is D. 144n.
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y=x^2-8x-8 quadratic function in vertex form
Answer:
[tex]y=(x+4)^2-8[/tex]
Step-by-step explanation:
[tex]y=x^2-8x-8[/tex]
complete the square.
[tex](x+4)^2-8[/tex]
set y equal to the new right side.
[tex]y=(x+4)^2-8[/tex]
Hope this helps!
Brainliest is much appreciated!
Answer:
Answer is Below!Step-by-step explanation:
a = 1
c = -8
b= -8
the formula of vertex form is a(x-h)^2 +k = y
First find H and k using the formula -b/2a = h
h = 4
so, k = -24
y =1(x-4)^2 -24
7.1 Calculate: -24÷-8-13 (1)
Answer:
-10
Step-by-step explanation:
BODMAS
Brackets
Of
Division
Multiplication
Addition
Subtraction
●When simplifying an equation follow the above order.
•Since division comes before subtraction, first divide -24 by -8 to get 3
•Then subtract 13 from 3 to give you -10.
A concrete sidewalk is being put around a square park. If the diagonal line across the center of a square park is 24 feet, what is the exact length of each side?
In a case whereby concrete sidewalk is being put around a square park. If the diagonal line across the center of a square park is 24 feet, the exact length of each side is 12 feet.
How can the exact length of each side be known?Based on the given condition from the question, We know that A diagonal is a line segment that joins two opposing polygonal vertices (or corners). In other terms, a diagonal is a line segment that joins two polygonal vertices that are not next to one another. One type of straight line is the diagonal. There is no straight up, down, or across in a diagonal line. It is a line that joins two shape's corners.
Then we can formulate as 24/2
= 12 feet.
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hi i don't get this question pls HELP! calculate the monthly repayments for the house loan(total cost divided by number of months) so for example i got my total cost that is 15,393,86 and i divided by the per month which is 12 so basically i did this and here is the answer:
(15,393,86 ÷ 12= 128282.1667) is this correct?
pls correct me and guid me
Yeah, it seems fine so you're doing great so far! ^^
Greatest common factor of 14b with a exponent of 3 and 5b with a exponent of 2
The only common factor is [tex]b^{2}[/tex] so the GCF is [tex]14b^{3}[/tex] and [tex]5b^{2}[/tex] is [tex]b^{2}[/tex]
Define common factor.The term "common" means "same for both." The two numbers' common factor is one that applies to both numbers.
The common factor between [tex]6[/tex] and [tex]10[/tex] is [tex]2[/tex], for instance. Although it is not the sole quality shared by each number, it is a trait that they both have in common.
To find the GCF of [tex]14b^{3}[/tex] and [tex]5b^{2}[/tex] we need to find the largest factor for both
[tex]14b^{3}[/tex] = 2*7*[tex]b^{2}[/tex]*[tex]b[/tex]
[tex]5b^{2}[/tex] = [tex]5*b^{2}[/tex]
Therefore the only common factor is [tex]b^{2}[/tex] so the GCF is [tex]14b^{3}[/tex] and [tex]5b^{2}[/tex] is [tex]b^{2}[/tex]
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The lenght of a rectangle is twice its breath. if the perimeter of a rectangle is 60cm, find the dimension of the rectangle.
Answer:
L = 20 , B = 10
Step-by-step explanation:
L = 2B
we know perimeter of rectangle = 2( L + B )
By substitution , 2( 2B+ B) =60
4B + 2B = 60
6B = 60
B= 10
L = 2 * B = 2 * 10 = 20
To approach the runway, a pilot of a small plane must begin a 7 degrees descent starting from a height of 1069 feet above the ground. To the nearest tenth of a mile, how many miles from the runway is the airplane at the start of this approach?
The airplane is approximately 1.7 miles from the runway at the start of the approach.
What is trigonometry?
Trigonometry, the branch of mathematics concerned with specific functions of angles and their application to calculations. There are six functions of an angle commonly used in trigonometry
To solve this problem, we need to use trigonometry. The angle of descent is 7 degrees, which means that the angle between the horizontal ground and the plane's flight path is 7 degrees. We can use the tangent function to find the distance from the runway:
tangent (7 degrees) = opposite / adjacent
The opposite side is the height of the plane above the ground, which is 1069 feet. The adjacent side is the distance from the plane to the runway, which we need to find.
tangent (7 degrees) = 1069 / adjacent
We can solve for the adjacent side by multiplying both sides by the denominator:
adjacent = 1069 / tangent(7 degrees)
Using a calculator, we get:
adjacent = 1069 / 0.122173048
adjacent = 8743.3 feet
To convert this to miles, we divide by the number of feet in a mile:
adjacent = 8743.3 / 5280
adjacent = 1.655 miles
Rounding to the nearest tenth of a mile, we get:
The airplane is approximately 1.7 miles from the runway at the start of the approach.
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HELP ASAP
i will mark you brainleast (30 points)
graphing quadratic functions in vertex form
*please answer correctly*
5. Vertex: (2, 2)
Dοmain: All real numbers
Axis οf symmetry: x = 2
Increasing οn: (-∞, 2)
Decreasing οn: (2, ∞)
What is quadratic functiοns?A quadratic functiοn is a pοlynοmial functiοn οf degree 2, where the highest pοwer οf the variable is 2. It has a parabοlic graph and is cοmmοnly used tο mοdel real-wοrld phenοmena.
5. Vertex: (2, 2)
Dοmain: All real numbers
Axis οf symmetry: x = 2
Increasing οn: (-∞, 2)
Decreasing οn: (2, ∞)
7. Vertex: (2, 3)
Dοmain: All real numbers
Axis οf symmetry: x = 2
Increasing οn: (-∞, 2)
Decreasing οn: (2, ∞)
Range: y ≥ 3
6.Vertex: (-2, -4)
Vertical shift: -4 units
Hοrizοntal shift: -2 units
Width: Cοmpressed hοrizοntally by a factοr οf 1/3
Reflected: Nο
8. Vertex: (-2, -2)
Vertical shift: -2 units
Hοrizοntal shift: -2 units
Width: Stretched by a factοr οf 3 in the vertical
Reflected: Nο
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Rosa is using a balance scale. She has a set of weights which consists of two one-gram, six two-gram, four eight-gram, and two thirty-two gram pieces. What could she use to balance a mass of 45 grams?
The combination of weights listed above would balance a mass of 45 grams on the balance scale.
How exactly does a balancing scale operate?A instrument used to determine an object's mass is a balancing scale. It is made out of a beam suspended from a fixed point, with two pans or trays hanging from either end. The beam is balanced when the mass of the objects on one tray equals the mass of the objects on the other tray. The principle of moments, according to which, when the beam is in equilibrium, the moment of force on one side of the balance is equal to the moment of force on the other, governs how a balancing scale functions.
Given that, Rosa can balance a mass of 45 grams using the given combinations.
Thus, total weight on the two sides are:
Left side: 32g + 6g + 6g + 1g = 45g
Right side: 8g + 8g + 2g + 2g = 20g
Hence, the combination of weights listed above would balance a mass of 45 grams on the balance scale.
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*PLS HELP ASAP*
what is the median of the graph?
(btw the graph is in height (feet and inches)
Answer:
5'6 and 5'0
Step-by-step explanation:
Put the graph in order of dots
4'11- 1
5'1- 1
5'3- 1
5'6- 1
5'0- 2
5'2- 2
5'5- 2
5'4- 5
The middle values are 5'6 and 5'0, so that should be the answer.
where would [-8,-6] be graphed on a coordinate grid
The point [-8,-6] would be graphed 8 units left and 6 units down from the origin (0,0) on a coordinate grid.
What is a coordinate grid?A coordinate grid, also called a Cartesian plane, is a two-dimensional plane formed by a horizontal x-axis and a vertical y-axis that intersect at the origin (0,0). It is used to graph and locate points in a two-dimensional space by their x- and y-coordinates.
The coordinate grid is formed by two perpendicular lines, the horizontal x-axis and the vertical y-axis.
The point [-8,-6] represents an ordered pair where -8 is the x-coordinate and -6 is the y-coordinate.
To graph this point on a coordinate grid, start at the origin (0,0), which is where the x-axis and y-axis intersect. Then, move 8 units to the left along the x-axis since the x-coordinate is negative.
After that, move 6 units down along the y-axis since the y-coordinate is negative. The point where you end up after moving left 8 units and down 6 units is the point (-8,-6).
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What is the median of the following data values? 10, 14, 15, 17, 20, 21, 22, 25
Answer:
The median of the data set is 18.5
Step-by-step explanation:
To find the median of this set of data values, we need to first arrange them in numerical order:
10, 14, 15, 17, 20, 21, 22, 25
The middle value is the median. If there is an odd number of values, there will be exactly one middle value, and if there is an even number of values, the median will be the average of the two middle values.
In this case, there are 8 values, which is an even number. So, we take the average of the sum of the 2 middle numbers:
Median of Data Set = (17 + 20)/2 = 18.5
Therefore, the median of the data set is 18.5.
classfify each number below as a rational or irrational number
Answer:
Step-by-step explanation:
-14.76: Rational
-sqrt(64): 64 is a perfect square so it is rational
1.4444444… rational numbers repeat their decimal digits at one point or another, so this is rational
pi is irrational, so 19pi is irrational.
sqrt(2)*sqrt(2) is rational, but not 2sqrt(2). Irrational.
Rewrite the following fraction as a decimal.
1/12
Answer pls
Answer:0.833333
Step-by-step explanation:
Answer:
0.08333
Step-by-step explanation:
pls mrk me brainliest
Find the value of x, y, and z. (Round to the 3rd decimal place if possible)
Addressing issue hand, we state that Therefore, the linear equation solution to the system of equations is: x = 0.5, y = 0.1667, z = -0.5 and x = 0.500, y = 0.167, z = -0.500
What is a linear equation?In algebra, a linear equation refers to one with its form y=mx+b. B is the gradient, and m is the esta. The preceding clause is commonly referred to as a "linear function with two variables" so even though y and x are variables. Bivariate linear equations are linear equations with two variables. There are several linear equations: 2x - 3 = 0, 2y = 8, m + 1 = 0, x/2 = 3, x + y = 2, and 3x - y + z = 3. When an equation seems to have the structure y=mx+b, where m is the slope and b is the y-intercept, it is said to be linear. When a measurement seems to have the formula y=mx+b, both with m identifying its slope and b denoting the y-intercept, it is said to be linear.
values of x, y, and z, we can use the system of equations
3x - 2y + z = 1
2x + y - z = 0
x + 2y + 3z = -1
We can use Gaussian elimination or any other suitable method to solve the system. Here's one way to do it:
3x - 2y + z = 1 (eq. 1)
2x + y - z = 0 (eq. 2)
x + 2y + 3z = -1 (eq. 3)
3x - 2y + z = 1 (eq. 1)
0.6667x + 1.3333y - 1.3333z = -0.6667 (eq. 2')
-0.3333y + 2.3333z = -1.3333 (eq. 3')
3.3333x - 0.3333z = 0.1667 (eq. 1')
0.6667x + 1.3333y - 1.3333z = -0.6667 (eq. 2')
2.1667z = -1.0833 (eq. 3')
z = -0.5
y = 0.1667
x = 0.5
Therefore, the solution to the system of equations is:
x = 0.5, y = 0.1667, z = -0.5
x = 0.500, y = 0.167, z = -0.500
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22. At a wedding, guests are given cone-
shaped cups filled with flower petals. The cups
have a radius of 5 centimeters and a height of
10 centimeters. If there are 150 cups, what is
the total volume of petals that all the cones will
hold? Round to the nearest whole number.
Answer:
The volume of one cone-shaped cup can be calculated using the formula V = (1/3)πr^2h, where r is the radius of the cone and h is the height. Substituting the given values, we get:
V = (1/3)π(5 cm)^2(10 cm)
V ≈ 261.8 cm^3
Therefore, one cup can hold approximately 261.8 cubic centimeters of flower petals.
To find the total volume of petals that all 150 cups will hold, we can multiply the volume of one cup by the total number of cups:
Total volume = 150 cups × 261.8 cm^3/cup
Total volume ≈ 39,270 cm^3
Rounding to the nearest whole number, we get that the total volume of petals that all the cones will hold is approximately 39,270 cubic centimeters.
Answer:
I forgot how to do this sorry
OFERING BRAINLIEST! Step by step explanation please!
Answer:
600ft²
Step-by-step explanation:
Volume of a cube V = a³
a³ = 1000
Cube root of both sides
a = 10ft
Surface area A =6a²
A = 6 x 10 x10 ft²
Answer:
600 feet²
Step-by-step explanation:
1) Break down the info
To answer this question we have to figure out the values of the sides. As it is a cube all sides should have the same area and length!
We know that the equation for volume is...
volume = area of cross-section x heightThis means that to simply find the sides, we can cube root 1000
[tex]\sqrt[3]{1000}[/tex] = 10Let's check...
10 x 10 x 10 = 10002) Find the surface area
We now know that the sides are 10 feet each so to find the surface area is [tex]6a^2[/tex] where a is the length of one side!
We can solve the question by plugging our numbers into the equation...
[tex]6[/tex] × [tex]10^{2}[/tex] = [tex]600[/tex]Our surface area is 600 feet!
Hope this helps, have a lovely day! :)
Find product of face values of all digits in
the number 91250
To find the product of the face values (the values of the digits as they appear in the number) of all digits in 91250, we can simply multiply the face values of each digit together.
The face value of a digit is simply the value of the digit itself, regardless of its position in the number.
So, we have:
9 * 1 * 2 * 5 * 0 = 0
Note that the face value of the digit 0 is 0, so any product that includes a 0 will also be 0.
Therefore, the product of the face values of all digits in 91250 is 0.
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Aysha and ahmed are going to dubai shopping festival next week. The table
shows the amount that each person spent on snacks ,games and sovenirs the last
time they went to shopping festival. Aysha wants to spend money using the same ratios as on her last trip to shopping
snacks games Souvenirs
Aysha Dh. 20 Dh25 Dh10
Ahmed Dh40 Dh20 Dh15
festival. If she spends Dh 100 this time on games how much she will spend on
souvenirs
As per the unitary method, Aysha will spend Dh45.45 on souvenirs if she spends Dh100 on games, using the same ratios as on her last trip to the shopping festival.
Now, let's use the unitary method to solve the problem at hand. We know that Aysha wants to spend money using the same ratios as on her last trip to the shopping festival. So, let's find out the ratio of the amount she spent on games to the total amount she spent on all three items (snacks, games, and souvenirs) on her last trip:
Amount spent on games = Dh25
Total amount spent on all three items = Dh20 + Dh25 + Dh10 = Dh55
So, the ratio of the amount spent on games to the total amount spent on all three items is:
Dh25/Dh55
Now, we know that Aysha wants to spend Dh100 on games this time. Let's use the unitary method to find out how much she will spend on souvenirs, given the ratio we just found.
If Dh25 is spent on games, then the total amount spent on all three items will be:
(Dh25/Dh55) * Total amount spent
And we know that the total amount spent is Dh100 (the amount Aysha wants to spend on games). So, substituting this value, we get:
(Dh25/Dh55) x Dh100
Simplifying this expression, we get:
Dh45.45
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A serving of skinny popcorn has 4 grams of fiber. This is about 16% of the recommended daily amount of fiber. How many grams of fiber are in the recommended daily amount?
A serving of skinny popcorn has 4 grams of fiber, which is about 16% of the recommended daily amount of fiber. The recommended daily amount of fiber is 25 grams.
If a serving of skinny popcorn has 4 grams of fibre and provides 16% of the necessary daily fibre intake, we can apply a proportion to calculate the entire recommended daily fibre intake:
If x is the required daily fibre intake in grams, we may calculate the following proportion:
4 / x = 16 / 100
We may cross-multiply and simplify to find x:
4 × 100 = 16 × x
400 = 16x
x = 25
As a result, the daily fibre recommendation is 25 grams.
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ACTIVITY (EXPERIMENTAL PROBABILITY) 50 trials
The dice i roll: 2, 3, 4, 4, 4, 4, 6, 5, 2, 4, 2
What is the probability of rolling a sum of even number?
What is the probability of rolling a sum of odd number?
What is the probability of rolling a sum of greater than 5?
This is for statistics ok? Ty!U,,w,,U♡
And please answer now thank you!:D
Answer:
1st=3/50
2nd=2/50
3rd=1/50
thats is if the only possible number you can roll are only from 2,6 not 1,6
A random sample of 10 venture-capital investments in the fiber optics business sector yielded the following data, in millions of dollars. Determine a 95% confidence interval for the mean amount, mu, of all venture-capital investments in the fiber optics business sector. Assume that the population standard deviation is $2. 84 million. (Note: The sum of the data is $62. 32 million. )
The 95% confidence interval for tthe population mean, μ of all venture-capital investments in the fiber optics business sector is equals to the 4.472 ≤ μ ≤ 7.990 that is ( 4.472, 7.990).
We have a random sample of venture capital investments in the fiber optics business sector.
Sample size, n = 10
Standard deviations, σ = $2.84 million
Sum of data, ∑xᵢ = $62.32 million
Confidence interval, CI = 95% = 0.95
We have to determine the 95% confidence interval for the mean amount.
Sample mean is defined as the sum of observations divided by number of observations. Mathematically, X-bar
= ∑xᵢ /n
= 62.32/10 = 6.232
Now, using the Z distribution table, the critical value at 0.05 significance level for two tailed test is = Z₀.₀₅/₂ = Z₀.₀₂₅
= 1.96
So, 95% confidence interval for the population mean is written as
CI₀.₉₅ = X-bar - Z(σ/√n ) ≤ μ ≤ X-bar + Z(σ/√n)
= 6.232 - 1.96(2.84/√10) ≤ μ ≤ 6.232 +
1.96(2.84/√10)
= 6.232 - 1.760 ≤ μ ≤ 6.232 + 1.760
= 4.472 ≤ μ ≤ 7.990
Hence, required interval is ( 4.472, 7.990).
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Without graphing, tell whether the slope of a line that models the linear relationship is positive, negative, zero, or undefined. Then find the slope.
A laptop battery has 85% power after 1 hour of use and 40% after after 4 hours of use
Answer:
its a negative slope because the battery is going down, not staying the same, or going up
Step-by-step explanation: