Caffeine is the active ingredient in coffee and many energy drinks. once caffeine is consumed it
has a half-life in the body of approximately 4 hours. an average cup of coffee contains 100mg of
caffeine. suppose you drink a cup of coffee at 8am, followed by another cup at 10am and an
afternoon cup of coffee at 3pm. how much caffeine is left in your body when you go to sleep at
11pm?

In 2000, for a certain region, 27.1% of incoming college freshman characterized their political views as liberal, 23.1% as moderate, and 49.8% as conservative. for this year, a random sample of 400 incoming college freshman yielded the frequency distribution for political views shown below. a. determine the mode of the data. b. decide whether it would be appropriate to use either the mean or the median as a measure of center. explain your answer. political view frequency liberal 118 moderate 98 conservative 184 a. choose the correct answer below. select all that apply. a. the mode is moderate. b. the mode is liberal. c. the mode is conservative. d. there is no mode.