Some of the sports drinks come in powdered form or in “light” versions.

a. Exceed powder comes in a 32-serving container for $9.43 and has 70 calories/ serving. Gatorade powder has a 32-serving size for $3.59 and has 60 calories per serving. Is it fair to include the powdered drinks on the same list with the liquid drinks and to figure their values into the averages? Why, or why not?

b. All Sport Lite has 2 calories per serving, at a cost of 24¢ per serving. Gatorade Light has 25 calories per serving, at a cost of 26¢ a serving. Will adding the light varieties to the list have much of an effect on the average cost per serving? Will adding the light varieties have much of an effect on the standard deviation of cost per serving?

c. Will adding the light varieties have much of an effect on the average calories per serving? Will adding the light varieties have much of an effect on the standard deviation of calories per serving? Describe the nature of this effect.

d. Can you think of a way to choose a typical value for the calories that is less affected by the two low values for the light varieties?