Beverage Expenditures. The Bureau of Labor Statistics publishes information on average annual expenditures by consumers in the Consumer Expenditure Survey. In 2010, the mean amount spent by consumers on nonalcoholic beverages was $333. A random sample of 12 consumers yielded the following data, in dollars, on last year’s expenditures on nonalcoholic beverages.

472 287 295 376 370 392 351 384 370 360 305 369 In Exercises 6.131–6.134,

a. obtain a normal probability plot of the given data.

b. use part

(a) to identify any outliers.

c. use part

(a) to assess the normality of the variable under consideration.