3. For each of the three above studies, determine if the rejection region would be on the one-sided left tailed, one-sided right tailed, or two-sided.

Let’ s do it! 1.8

The following table summarizes the results of three studies:

Study A
H0 :The true average lifetime ³ 54
H1 :The true average lifetime < 54
P-value = 0.0251

Study B
H0 : The average time to relief for Treatment I is equal to the average time to relief for Treatment II
H1 : The average time to relief for Treatment I is not equal to the average time to relief for Treatment II
P-value = 0.0018

Study C
H0 :The true proportion of adults who work 2 jobs is £ 0.33
H1 :The true proportion of adults who work 2 jobs is > 0.33
P-value = 0.3590

1. For which study do the results show the most support for the null hypothesis?



2. Suppose Study A concluded that the data supported the alternative hypothesis that the true average lifetime is less than 54 months, but in fact the true average lifetime is greater than or equal to 54 months. Is this a Type I or Type II error?

 

 

 

 

 

 

 

 

Study A: one-sided to the right one-sided to the left two-sided

Study B: one-sided to the right one-sided to the left two-sided

Study C: one-sided to the right one-sided to the left two-sided