The file fast food contains the amount if that a sample of fifteen 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 therein amount spent for lunch is different from $6.60?
B) Determine the p-value in (A) and interpret its 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.
