A Random Sample of 25 Students Selected from the Student

Multiple Choice

A random sample of 25 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 is significantly more than 24. Assume the distribution of the population of ages is normal. Using α = .05, it can be concluded that the population mean age is

A) not significantly different from 24.
B) significantly different from 24.
C) significantly less than 24.
D) significantly more than 24.