Chapter 12.2, Problem 7E

For Exercises 3 through 8, the null hypothesis was rejected. Use the Scheffe test when sample sizes are unequal or the Tukey test when sample sizes are equal, to test the differences between the pairs of means. Assume all variables are normally distributed, samples are independent, and the population variances are equal.

7. Exercise 18 in Section 12-1.

18. Calories in Fast-Food Sandwiches Three popular fast-food restaurant franchises specializing in burgers were surveyed to find out the number of calories in their frequently ordered sandwiches. At the 0.05 level of significance, can it be concluded that a difference in mean number of calories per burger exists? (The information in this exercise will be used for Exercise 7 in Section 12-2.)

FF#1	FF#2	FF#3
970	1010	740
880	970	540
840	920	510
710	850	510
	820

Source: www.fatcalories.com