Watch that caffeine? 'The U.S. Food and Drug Administration (USFDA) limits the amount of caffeine in a 12 -ounce can of carbonated beverage to 72 milligrams. That translates to a maximum of 48 milligrams of caffeine per 8 -ounce serving. Data on the caffeine content of popular soft drinks in milligrams per 8-ounce serving are shown in the stemplot below.
(a) Why did we split stems?
(b) Give an appropriate key for this graph.
(c) Describe the shape, center, and spread of the distribution. Compare the caffeine content of these drinks with the USFDA's limit.