Dr. Reyes is examining whether exercise is linked to mood. She recruits a sample of college students and asks them to answer whether they exercised at least three times last week (yes or no) and to rate their mood in the last week (1: Not happy at all to 5: Very happy). Her results show that students who exercised in the last week also reported happier moods. Can Dr. Reyes make a causal inference from her study

Answers

Answer 1

The answer to whether Dr. Reyes can make a causal inference from the study is;

No, she can't make a casual inference from the study because she met only one of the three criteria's for causality.

To answer this question, we need to know the conditions for causality in statistics research because causality gives the relationships such that a change in one variable would have to result in a change in another variable.

Now, the three conditions are;

1) Covariation; This condition means that the causal variable must have to vary with with the variable it is assumed to cause in a systematic manner.

2) Temporal precedence; Thus condition simply means that cause must precede effect. In summary it denotes that the variable that has the causal effect must come before the effect that it is meant to cause.

3) Control for extraneous variables; This condition means that results of an experiment or research must not be due to factors outside of the experiment/research

     Now, in our question, he fulfilled the covariation condition because the

result of the research is tied to the responses from the sample students.

However, she did not fulfill the temporal precedence because the cause of

their moods did not precede the effects in his research.

Also, she did not fulfill the condition of control of extraneous variables

because other factors outside of the research itself may have affected their

moods.

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Related Questions

5. Three of the vertices of rectangle ABCD are given. Find the coordinates
of point D. Find the value of the variable.
A(3,6), B(6, 7), C(6,3), D(x, y)

Answers

The answer is (7,6)
The answer is (7,6)

State the angle relationship and state the measure of each angle indicated that makes lines u and v
parallel

Thank you smmmmm I will mark you btw !

This is a better pic!

Answers

Answer:

Q9. ?=53° (corr angles, u//v)

Q10. ?=58° (alt angles, u//v)

5/3y=-(x-5) the slope intercept

Answers

Answer:

y = - [tex]\frac{3}{5}[/tex] x + 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c

Given

[tex]\frac{5}{3}[/tex] y = - (x - 5) ← distribute parenthesis

[tex]\frac{5}{3}[/tex] y = - x + 5 ( multiply through by 3 to clear the fraction )

5y = - 3x + 15 ( divide terms by 5 )

y = - [tex]\frac{3}{5}[/tex] x + 3 ← in slope- intercept form

Which of the following functions best describes this graph?
10

Answers

Answer:

A

Step-by-step explanation:

vertex = (-4, -4)

vertex form:

y = a(x-h)^2 + k

__________

y = (x- (-4))^2 + (-4)

y = (x+4)^2 -4

y = (x+4)(x+4) - 4

y = x^2 + 8x + 16 - 4

y = x^2 + 8x  + 12

answer: A

find the y intercept
y = 3/4x - 4

Answers

It is 8+783 to the 2 power
the y-intercept is the point on the graph where it crosses the y-axis, and has coordinates (0, b). It is also the value of y when x = 0.

To find the y-intercept, set x = 0:

y = -3/4(0) - 4

y = 0 - 4

y = -4.

Therefore, the y-intercept is (0, -4), or -4.

Determine the value of x.

Answers

Answer:

Step-by-step explanation:

find a number that can go into 30 and go and then what ever you get multiply it with five and X will be your answer

Helpppppppppppppppppppppppppppp

Answers

Answer:

it would be A-28.66

Step-by-step explanation:

just divide the total bill by the number of months.

Answer:

The apple question is b and the bill question is a

Step-by-step explanation:

for the apple question you multiply 1.89 by 2.4 and round to the nearest 10th

for the bill question you divide 85.98 by 3 which gives you 28.66

prove that , a⁴+=47
[tex] \frac{1}{a 4} [/tex]

Answers

Step-by-step explanation:

Wyzant

ALGEBRA 2 ALGEBRA QUESTION

Ahnaf A. asked • 09/16/15

If a+1/a = 4, what is the of a4+1/a4 ?

IF a + 1/a = 4 . Then what is the value of a4 + 1/a4 ?

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Jon P. answered • 09/16/15

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First, notice that (a + 1/a)2 = 42 = 16. But also, (a + 1/a)2 = a2 + 2a(1/a) + 1/a2 = a2 + 2 + 1/a2 = a2 + 1/a2 + 2

So a2 + 1/a2 + 2 = 16, so a2 + 1/a2 = 14.

Now, do that again...

(a2 + 1/a2)2 = 142 = 196, but also (a2 + 1/a2)2 = a4 + 2(a2)(1/a2) + 1/a4 = a4 + 2 + 1/a4 = a4 + 1/a4 + 2

So a4 + 1/a4 + 2 = 196, so a4 + 1/a4 = 194

You can see the pattern... E.g., a8 + 1/a8 = 1942 - 2, etc.

...welcome...

simplify the following surd expressions a) 9√3 - 4√3 + √5 + 2√5 b) 10√2 + 4√7 - 6√2

Answers

A) 5√3 + 3√5
B) 4√2 + 4√7

Answer:

[tex]a)\:5\sqrt{3}+3\sqrt{5}[/tex]

[tex]b)-6\sqrt{2}+4\sqrt{7}[/tex]

Step-by-step explanation:

[tex]a)\:9\sqrt{3}-4\sqrt{3}+\sqrt{5}+2\sqrt{5}[/tex]

We need to combine like terms:

[tex]9\sqrt{3}-4\sqrt{3}[/tex]

[tex]=5\sqrt{3}[/tex]

[tex]\sqrt{5}+2\sqrt{5}[/tex]

[tex]=3\sqrt{5}[/tex]

[tex]5\sqrt{3}+3\sqrt{5}[/tex]

__________________

Combine like terms:

[tex]b)\:0\times \sqrt{2}+4\sqrt{7}-6\sqrt{2}[/tex]

[tex]0\cdot \sqrt{2}-6\sqrt{2}[/tex]

[tex]=-6\sqrt{2}[/tex]

[tex]-6\sqrt{2}+4\sqrt{7}[/tex]

____________________

Write the equation using the graph In slope-intercept form

Answers

Answer:

y=(2/3x)+2

Step-by-step explanation:

Selected Points: (3,4) & (-3,0)

Slope (m) = (y2-y1) / (x2-x1)

m=(4-0) / [3-(-3)]

m=4/(3+3)

m=4/6

m=2/3

Point Slope Form: y-y1=m(x-x1)

y-4=(2/3)(x-3)

y-4=(2/3x)-2

y=(2/3x)+2

Please help me with this from 1 to 10

Answers

Answer:

2. makes

3. had wanted

4. are deciding, get

5. are going

6. ate

7. will be traveling

8. are

9. asked

10. lose

Answer:

2. Wanted

3. Wants

4. Decides and Get

5. Went

6. Ate

7. Are Traveling

8. Are

9. Asks

10. Lost

Step-by-step explanation: What grade are you in??

Convert the following.
15, 000 m² =________hectare
2.5 hectares =_______m²​

Answers

Answer:

15,000 m²= 1.5 hectares

2.5 hectares= 25, 000 m²

Step-by-step explanation:

Sana makatulong

WILL MARK BRAINLIEST, NO FAKE ANSWERS
Design 2 rectangular pizzas both with an area of 64 square inches but with different perimeters

Answers

Answer:

rectangle one:

height = 2

width = 32

rectangle 2 :

height = 4

width = 16

Step-by-step explanation:

If you like squid game, trust me :) lol

The slope of the line is 0. It passes through the point (-3,4). Identify two other points on the line. Justify you answer

Answers

Answer:

Two other points: (2, 4) (6, 4)

Step-by-step explanation:

A line with a slope = 0 is a horizontal line [with a y-intercept of (0, b)], given by the linear equation, y = 4.  This means that the y-coordinate will always equal to 4, regardless of its corresponding x-coordinate. Basically, we could choose any x-coordinate to pair with the y-coordinate of 4.

I chose the ordered pairs, (2, 4) and (6, 4).

Attached is a screenshot of the graphed linear equation, y = 4.        

What is the value of 7r + 6(r + 2s) when r = 4 and s = 2?

Answers

Answer:

76

Step-by-step explanation:

7(4)+6(4+2(2)

28+6(8)

28+48 it gives 76

⚠️⚠️Please help⚠️⚠️ Pip and Ali share S785 in the ratio Pip:Ali = 4:1.

Work out Pip's share.

Answers

Answer:   $628

==========================================================

Work Shown:

x = Ali's share

4x = Pip's share, because it is four times bigger due to the ratio 4:1

x+4x = 5x = total amount of money = 785

5x = 785

x = 785/5

x = 157 dollars is Ali's share

4x = 4*157 = 628 dollars is Pip's share

Note that 157+628 = 785 to help confirm the answer.

The perimeter of a triangle is 17x−5 units. One side is 3x+5 units and another is 8x−3 units. How many units long is the third side?

Answers

Answer:

17x−5 =85       3x+5 =15      8x-3= -24 here you can use this to find your awnser

Step-by-step explanation:

What is Prefix? ︎︎ ︎︎ ︎︎ ︎︎​

Answers

a word, letter, or number placed before another.

Find the length of the third side. If necessary, write in simplest radical form.

Answers

Answer: [tex]3\sqrt{3[/tex]

Step-by-step explanation: use pythagorean theorem to solve this. which is a^2 + b^2 = c^2

lets say b=3 and c=6. plug this into the equation.  (6)^2 - (3)^2 + = 36 - 9 which is 27 = c^2. to get c from c^2, square root the c^2 value

the square root of 27 is [tex]3\sqrt{3[/tex] in simplest radical form

select all of the situation is below that can be modeled by the expression 4 + 3 * ​

Answers

Answer:

3+4?

Step-by-step explanation:


the function g is defined g (x) = x + 4 over 2x + 3

Answers

Answer:

(x+8)/(2x+11)

Step-by-step explanation:

g(x)=(x+4)/(2x+3)

g(x+4)=(x+4+4)/(2(x+4)+3) = (x+8)/(2x+8+3) =(x+8)/(2x+11)

25% of 94?

please explain!

Answers

Answer:

23.5

Step-by-step explanation:

25% of 94

[tex] = 94 \times \frac{25}{100} [/tex]

[tex] = 94 \times \frac{1}{4} [/tex]

= 23.5 (Ans)

Answer:

25% of 94 is 23.5

Step-by-step explanation:

step 1: Convert the problem to an equation using the percentage formula: P% * X = Y.

step 2: take your percent then turn it into a decimal like 10% is 0.10

step 3: then multiply your decimal by your whole number like 0.10 * 65 to get your answer

plz give brain if this helps and is correct thx <(^w^)>

Pls help me. I will give you 10 points respond fast!

Answers

Answer:

plz tell first what is your answer

Step-by-step explanation:

GCF of 36 and 99 is the largest possible number that divides 36 and 99 exactly without any remainder. The factors of 36 and 99 are 1, 2, 3, 4, 6, 9, 12, 18, 36 and 1, 3, 9, 11, 33, 99 respectively.

What’s ur answer
Add a pic or something

115 - 12
4
-21 + 9
2) Simplify:
1-2811
A. -24
3
B.
4
C.
3
4
1
D. 2
4

Answers

Answer:

by my calculator I got 2.25

Need help ASAP! Directions in picture;)

Answers

Answer:

x=94/5

Step-by-step explanation:

10x-8=180

10x=188

x=188/180

x=94/5

HELP, PLEASE HELP ME

Answers

8x=10
8(1)=8
8(1.5)=12
8(1.25)=10
X=1.25
The scale factor is 1.25 or 5/4

HELP PLEASE!!
What is the value of x

Answers

X=-8 is your answer for this problem

15w^4 v^5 / 3w^6 v^5

Answers

Answer:

[tex]\frac{{5}}{w^{2}}[/tex]

Step-by-step explanation:

We begin with [tex]\frac{15w^{4}v^{5}}{3w^{6}v^{5}}[/tex].

Firstly, as with simplifying fractions we can simplify the numbers. 15 is divisible by 3, so this becomes [tex]\frac{5w^{4}v^{5}}{w^{6}v^{5}}[/tex].

To simplify indices (aka exponents or powers), we must subtract the power on the denominator from the matching one on the numerator, and then use that number as the power in the numerator. In this case, 4-6 and 5-5, which becomes -2 and 0.

So now we have [tex]\frac{5w^{-2}v^{0}}{1}[/tex].

For a negative power, we switch it into the other half (numerator to denominator) and take away the negative sign, leaving [tex]\frac{5v^{0}}{1w^{2}}[/tex].

We can remove the [tex]v^{0}[/tex] in the numerator as it just multiplies the numerator by one, and remove the 1 in the denominator for the same reason.

This leaves us with [tex]\frac{5}{w^{2}}[/tex].

**This content involves division with indices, which you may wish to revise. Let me know if you have any questions. I'm always happy to help!

How many liters of a 50% acid solution must be mixed with a 30% acid solution to get 180 L of a 40% acid solution?
____ liters of a 50% acid solution must be used.

Answers

Answer: 90

Step-by-step explanation:

Solve for x
1. x/5 + 4=6

A x= -1
B. x= -8
C. x= 13
D. x= 10
E. x=1/3
f. x=8​

Answers

Answer:

D. x=10

Step-by-step explanation:

6 - 4 = 2

5 x 2 = 10

10/5 + 4 = 6

:)

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