The file contains the amount that a sample of nine customers spent for lunch ($) at a fast-food restaurant:
4.2 5.03 5.86 6.45 7.38 7.54 8.46 8.47 9.87
a. Compute the mean and median.
b. Compute the variance, standard deviation, range, and coefficient of variation.
c Are the data skewed? If so, how?
d. Based on the results of (a) through (c), what conclusions can you reach concerning the amount that customers spent for lunch?