The concentration of carbon dioxide (CO2) in the atmosphere is increasing rapidly due to our use of fossil fuels. Because plants use CO2 to fuel photosynthesis, more CO2 may cause trees and other plants to grow faster. An elaborate apparatus allows researchers to pipe extra CO2 to a 30-meter circle of forest. They selected two nearby circles in each of three parts of a pine forest and randomly chose one of each pair to receive extra CO2. The response variable is the mean increase in base area for 30 to 40 trees in a circle during a growing season. We measure this in percent increase per year. Here are one year's data.

Pair Control plot Treated plot
1 9.728 10.748
2 7.276 8.332
3 5.612 6.632

Required:
a. State the null and alternative hypotheses.
b. Explain clearly why the investigators used a one-sided alternative.

1. The researchers have no preconceived idea what extra CO2 will do to the growth rate.
2. The researchers have reason to believe that CO2 will decrease growth rate.
3. The researchers have reason to believe that CO2 will increase growth rate.

c. Carry out a test and report your conclusion in simple language.

Answers

Answer 1

Answer:

this is math go to siecne noob

Step-by-step explanation:


Related Questions

Find an equivalent ratio in simplest terms 44:80

Answers

Answer:

11:20

Step-by-step explanation:

Divided by 4

Please answer quickly I really need this answer

Answers

D - 10

hope this helps :)

Answer:

The answer is 10

Given that the expression "p dollars for every q items" describes a unit price, which statement must be true? p=1 p=9 q=1 pg= 1​

Answers

Answer:

p = q

Step-by-step explanation:

Answer:

the answer is q=1

Step-by-step explanation:

I did the quiz

Help me if you can I would appreciate it thx

Answers

Answer: For the first one its J

The second one its H

Step-by-step explanation:

Which is the best description for the graph?

Answers

Answer:

decreasing, then increasing. the parabola decreases as it approaches the vertex, then increases afterward

whats heavier a pound of cotton or a pound of stone

Answers

Answer:

None

Step-by-step explanation:

Both a pound

Answer:

Same weight

Step-by-step explanation:

There is a pound of each so they weight the same :)

a bag contains 12 blue marbles and 8 blue what is the ratio of blue to red

Answers

Answer:12:8 or 12 to 8 or u could do it in fraction form

What is the ratio of 20 praise and 2000 rupees

Answers

1:100 because 20 divide by 20=1 and 2000 divide by 20 =100

Answer:

1 rupee=100 paisa

so, 20 paisa:2000 rupees

=>20 paisa:2000×100

=>1:10000.

How would you graph y = -4/9x + 6

Answers

9514 1404 393

Answer:

graph the y-interceptfind another point (down 4, right 9)draw the line through the 2 points

Step-by-step explanation:

When the equation of a line is given in slope-intercept form, as this one is, it is usually convenient to make use of those values (intercept and slope).

Here, the y-intercept is 6. The slope is -4/9, which means the line goes down 4 units for each 9 units to the right.

The y-intercept is graphed at (0, 6). An additional point can be graphed at (9, 2). Then the line can be drawn through these points.

If I was asked to think of a number and multiply it by 2, I could
write this algebraically as 2x.
Write the following algebraically, using x as your unknown.
"I think of a number, multiply it by 2, subtract 3 and multiply the result by 4.​

Answers

Answer:

4(2x-3)

Step-by-step explanation:

Answer:

4 x (2x-3)

I hope it helps

Pls mark as Brainliest

which is bigger, 3/5 or 0.625

Answers

0.625 is bigger
When you divide 3/5 the result is 0.6
So yeah hope this is helpful



Rewrite it as a function and isolate Y. ​

Answers

Answer: y= -2x + 12

or f (y ) = 6 - [tex]\frac{y}{2}[/tex]

Step-by-step explanation:

just subtract the 2x to get the y alone

The supermarket has 30 aisles. 60% are empty, without any shoppers. How many empty aisles are there in the supermarket?

Answers

Answer:

18

Step-by-step explanation:

to find the percentage of something you change the percent to a decimal and multiply it by the other number, so in this case you have 0.6*30 and you get 18.

hope this helped :))

To observe the effect of a categorical IV on a categorical DV (or variables recoded categorically from quantitative data), you would use the:

Answers

Answer:

Dummy Coding

Step-by-step explanation:

Dummy Coding is used to observe the effect of one categorical variable on another.

In this case, the first categorical variable is independent (ICV) while the other is dependent (DCV).

The dummy coding system makes use of two numerical values; 0 representing the absence of an effect and 1 representing the presence of that effect.

Evaluate this expression: 39 ÷ (2 + 1) - 2 × (4 + 1).

Answers

Answer:

9.5

Step-by-step explanation:

here's my work

An expression is defined as a set of numbers, variables, and mathematical operations. The solution for the expression  39 ÷ (2 + 1) - 2 × (4 + 1) is 3.

What is an Expression?

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

Using the rule of BODMAS the solution for the expression  39 ÷ (2 + 1) - 2 × (4 + 1) is,

39 ÷ (2 + 1) - 2 × (4 + 1)

=  39 ÷ (3) - 2 × (5)

= 13 - 2  × (5)

= 13 - 10

= 3

Hence, the solution for the expression  39 ÷ (2 + 1) - 2 × (4 + 1) is 3.

Learn more about Expression:

https://brainly.com/question/13947055

#SPJ2

Determine the intercepts of the graph please be sure

Answers

X = (7,0) y= (0,2)


Hope this helps!!

Answer:

X= (_7, 0)

Y= (0, 2

Step-by-step explanation:

We meet again

Help me please! If you can explain it will help me a lot, if not then it’s okay.

Answers

Answer:

I cant help bc it doesnt show :((( sorrrrry

Step-by-step explanation:

D should be the answer

0.9 7/8 0.86 least to greatest work

Answers

Answer:

7/8, 0.86, 0.9

Step-by-step explanation:

Convert 7/8 to a decimal:

7 / 8 = .875

Solve:

.875, .86, .9

Or:

7/8, 0.86, 0.9

Ok so If and anchor descends -17.5 meters down in the ocean in 5 seconds, how much does it descend in 1 second?

Answers

-3.5 meters

explanation:
Divide -17.5 by 5 to get the distance the anchor travels in one second
-3.5 meters
Pls give the top person branly

This is a fast question i will give you brainlest if you annswer this question What is elapsed time also what 100 ÷ 300 no rush just try yiur best. Thank you​

Answers

Answer:

100÷300 =3 I know only this answer

The number of pages that Armando, Billy, Robert, and Joel can read in a day is shown below.
Armando read 15% of his 46-page book.
Billy read 11% of his 72-page book.
Robert read 12% of his 68-page book.
Joel read 14% of his 69-page book.

Who can read the greatest number of pages in a day?


a Armando
b Joel
c Billy
d Robert

Answers

B Joel hope this helps

Answer: B. Joel

hope this helps :}

José correctly answered 80% of the
questions on a language arts quiz. If he
answered 16 questions correctly, how ma
questions were on the language arts quiz

Answers

Answer:

20

Step-by-step explanation:

80% needs 20% more to be 100%  so we devide 16 by 4 to get the awnser for 20% witch is 4 so 16+4 is equal to 80% + 20% so 20

Answer:

20

Step-by-step explanation: 16 you need to 2  more question to get 100 so if you use your brain and imagine doing a test and you get an 80 percent and answered 16 correct go back to the test to see what you have

Leon was asked to repaint the sign for his mother's ice cream shop, so he needs to figure out how much paint he will need. Determine the area of the ice cream cone on the sign. Round to the nearest tenth. 6 in 12 in.​

Answers

Answer:

50.1

The area of the composite figure is 50.1

Trust me

On Joe's bookshelf are: • 8 fiction books 3 non-fiction books • 4 historical drama books Joe will randomly choose 1 book to read from the shelf. What is the probability that he will choose a non-fiction book? A)0.267 B)0.8 C)0.2 D)0.533​

Answers

Answer:

There is a 0.2 chance or 20% change that he will choose a nonfiction book. PLease mark as helpful if it is! thanks

4
5
÷ 1
10
= ?

To solve this problem, ask the question


The quotient is .

Answers

Answer:

4.5

Step-by-step explanation:

I did 45/1 I and it's 45 then 45/10

What is the unit rate for meters per second if a car travels 414 meters in 23 seconds?

Answers

Answer:

18 meters per second

Step-by-step explanation:

414/23=18

Not trying to be rude but you should know how to do this with or without a calculator

Write three expressions that are the equivalent of 5of 100, 000 , first as a numberthen in wordsfinally in scientific notation

Answers

Answer: 1) 500, 000

2) Five hundred thousand

3) [tex]5\times10^5[/tex]

Step-by-step explanation:

To express: 5 of 100, 000 in three expressions (First - number. second - word , third - scientific )

5 of 100, 000 = 5 x 100, 000 = 500, 000

In word - Five hundred thousand [ as place value of 5 =  hundred thousand]

In scientific notation, [tex]500, 000=5\times10^5[/tex]

Hence, the required expressions:

1) 500, 000

2) Five hundred thousand

3) [tex]5\times10^5[/tex]

Zales was having a 60% off sale on all rings. Also if you shopped on Wednesdays, you got an extra 10% off. How
much would a $899.00 ring cost on Wednesday?
(Round to the nearest penny and label your answer $).

Answers

Answer:

it will be 199.00 dollors you have to spend

Step-by-step explanation:

899.00-70

Pls pls Pls pls Pls Pls help me pls pls pls pls pls pls ASAP pls pls pls Pls pls Pls pls Pls Pls help me pls pls pls pls pls pls ASAP pls pls pls Pls I WILLL BRAINLIEST!!!!

Answers

Answer:

y = -3x - 8

Step-by-step explanation:

Slope-Intercept Form: y = mx + b

m - slope

b - y-intercept

Step 1: Define

slope m = -3

y-intercept = -8

Step 2: Plug into equation

y = -3x - 8

How much of the pumpkin bread does edgar get in all find the quotient.
3 ÷ 5=??

Answers

Answer:

hi i am doing that i ready lesson right now the answer is 3/5

Step-by-step explanation:

Answer:

3/5

Step-by-step explanation:

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