The U.S. Department of Health and Human Services collected sample data for 772 males between the ages of 18 and 24. That sample group has a mean height of 69.7 inches with a standard deviation of 2.8 inches. Find the 99 percent confidence interval for the mean height of all males between the ages of 18 and 24.
A) [63.19, 76.21]
B) [62.49, 76.91]
C) [69.65, 69.75]
D) [69.47, 69.93]
E) [69.44, 69.96]

Question

Quizplus · Accepted Answer

[± ] = [69.7 ± 2.576(2.8/ 27.78)] = [69.7 ± .2596]
= [69.44, 69.96]

The US Department of Health and Human Services Collected Sample Data