Question

16 observations are randomly chosen from a normally distributed population, with a known standard deviation of 16 and a sample mean of 144. What is the upper bound of a 99% confidence Interval?

Answer choices:

154.3

153.3

151.8

146.6

Answer 1

Mean = 144

Sample size (n) = 16

Standard deviation (s) = 16

Confidence interval(in %) = 99

Since we know that

Required confidence interval

Required confidence interval = (144.0-11.7868, 144.0+11.7868)

Required confidence interval = (132.2132, 155.7868)

The upper bound of a 99% confidence Interval is 155.8

Please hit thumps up if the answer helped you.