Sam Ying a career counselor claims the average number of yea

Sam Ying, a career counselor, claims the average number of years of schooling for an engineer is 15.8 years. The average number of years of schooling for an engineer is normally distributed. A sample of 16 engineers had a mean of 15.0 years and a standard deviation of 1.5 years. Which test is more appropriate for evaluating the claim?

Select one:

a. z-test

b. t-test

Solution

As n = 16, which is less than 30, then we use the t test. [ANSWER, OPTION B: T TEST]