Four research teams each used a different method to collect data on how fast a new brand of paint dries. Assume that they all agree on the sample size and the sample mean (in minutes). Use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation.
A- confidence level 95%: confidence interval: 40 to 50
B- confidence level 95 % confidence interval 35-55
C- confidence level 68% confidence interval 44.5-45.5
D- confidence level 99.7% confidence interval 42-48

Question

Four research teams each used a different method to collect data on how fast a new brand of paint dries. Assume that they all agree on the sample size and the sample mean (in minutes). Use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation.
A- confidence level 95%: confidence interval: 40 to 50
B- confidence level 95 % confidence interval 35-55
C- confidence level 68% confidence interval 44.5-45.5
D- confidence level 99.7% confidence interval 42-48

anonymous · Answer

@Nurali