**Chapter 17: Inference about a Population Mean****Data Table:**| Pair | Control Plot | Treated Plot ||------|--------------|--------------|| 1 | 9.752 | 10.587 || 2 | 7.263 | 9.244 || 3 | 5.742 | 8.675 |**Questions:**(a) State the null and alternative hypotheses. Explain clearly why the investigators used a one-sided alternative.(b) Carry out a test and report your conclusion in simple language.(c) The investigators used the test you just carried out. Any use of the t procedures with samples this size is risky. Why? **17.37 Growing trees faster.** 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. The following are one year’s data.

Given data: Pair Control plot Treated plot 1 9.752 10.587 2 7.263 9.244 3 5.742 8.675

Answered: CHAPTER 17. Inference about a…

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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Pair	Control plot	Treated plot
1	9.752	10.587
2	7.263	9.244
3	5.742	8.675