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 is significantly more than 24 . Assume the distribution of the population of ages is normal. The test statistic is

a. 1.96.
b. 2.00.
c. 1.65.
d. .05.

b

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