A random sample of 16 students selected from the student body of a large university had an average age of 25 years. We want to determine if the average age of all the students at the university is significantly different from 24 . Assume the distribution of the population of ages is normal with a standard deviation of 2 years. At a .05 level of significance, it can be concluded that the mean age
is _____.
a. not significantly different from 24
b. significantly different from 24
c. significantly less than 24
d. significantly less than 25
a
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