coudl you explain thes things?

A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. We want to determine if the average age of all the students at the university more than 24. Assume the distribution of the population of age is normal. Thetest statistics is O a. 2.00 O b. 2.96 O c. 1.645 Q d. 0.05 A random sample of 16 students selected from the student body of a targe university had an average age of 25 years and a standard deviation of 2 years. We want to determine f the average age of all the students at the university more than 24. Assume the distribution of the population of age is normal. At a 5% level of signicance. it can be con ctuded that the mean age is O a. not signicantly different from 24 O b, signicantly less than 24 O c. signtcantly different from 24 0 d. signicantty more than 24