The file fast food contains the amount that a sample of teens customers spent for lunch at a fast food restaurant:
7.42, 6.29. 5.83, 6.50, 8.34, 9.51, 7.10, 6.80, 5.90, 4.89, 6.50, 5.52, 7.90, 8.30, 9.60
A) At the 0.05 level of significance, is there evidence that the mean amount spent for lunch is different from 6.5?
B) Determine the p-value in (A) and interpret it meaning.
C) What assumption must you make about the population distribution in order to conduct the t-test in (A) and (B).
D) Because the sample size is 15, do you need to be concerned about the shape of the population distribution when conducting the t-test in (A), explain.