We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation of 7 minutes.
We want our 90 percent confidence interval to have a margin of error of no more than plus or minus 4 minutes. What is the smallest sample size that we should consider?
A) 2 B) 9 C) 34 D) 3
Question 2
Consider a completely randomized design with five treatments. How many pairwise comparisons of treatments are made in a Bonferroni analysis?
A) 5 B) 20 C) 10 D) 5 = 120
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