Answered: The concentration of carbon dioxide…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

The concentration of carbon dioxide (COy) in the atmosphere is increasing rapidly due to our use of fossil fuels. Because plants use COz to fuel photosynthesis, more COz may cause trees and other plants to grow faster. An elaborate apparatus allows researchers to pipe extra CO, 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 COz. 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 percentage increase per year. Here are one year's data

Pair

Control Plot

9.752

7.263

5.742

Treated Plot

10.587

9.244

8.675

Treated - Control

0.835

1.981

2.933

State the null and alternative hypotheses. Explain clearly why the investigators used a onesided alternative.
Use at procedure to carry out a test and report your conclusion in simple language.
The investigators used the test you just carried out.
Any use of the t procedures with samples this size is risky. Why?

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