A researcher investigated the effectsof green and red light on the growth rate of beanplants.ﾃつﾃつThe table below summarizes the heights (ininches) of bean plants from soil to first branchingstem.ﾃつﾃつ
Light | Sample Mean | Sample Standard Deviation | Sample Size |
Red | 8.36 | 1.50 | 17 |
Green | 8.94 | 2.78 | 25 |
(A ﾃ｢竄ｬ窶 10 pts.)ﾃつﾃつUse thePooled two-sample t-procedure to construct the 95% confidenceinterval for the difference in mean height for bean plants exposedto these two colors of light.ﾃつﾃつ(You do not need tointerpret the confidence interval.)
(B ﾃ｢竄ｬ窶 8 pts.)ﾃつﾃつSuppose thatyou wish to address the question of whether mean height differs forbean plants exposed to these two colors of light.ﾃつﾃつStatethe null hypothesis and the alternative hypothesis, usingappropriate notation. Clearly identify what each symbolrepresents.ﾃつﾃつDo not attempt to conduct thetest.
