Question

A laboratory tested 89 chicken eggs and found that the mean amount of cholesterol was 192 milligrams. Assume that sigma equals 15.2 milligrams. Construct a​ 95% confidence interval for the true mean cholesterol​ content, mu​, of all such eggs. Round to one decimal place.

A. 189.3 to 194.7 milligrams B. 188.8 to 195.2 milligrams C. 188.2 to 195.8 milligrams D. 187.8 to 196.2 milligrams

Part 2:

Thirty randomly selected students took the calculus final. If the sample mean score was 93 and the standard deviation was14.4, find the​ 99% confidence interval for the mean score of all students. Assume the population is normally distributed and round to two decimal places.

A. 85.75 to 100.2585.75 to 100.25

B. 88.53 to 97.4788.53 to 97.47

C. 86.53 to 99.4786.53 to 99.47

D. 85.78 to 100.22

Answer 1

1.

2.