4.2

An article gave the accompanying data on caffeine, in milligrams, per ounce for eighttop-sellingenergy drinks and for 11high-caffeineenergy drinks.

Top-Selling Energy Drinks

9.6 10.0 10.0 9.0 10.9 8.9 9.5 9.2

High-Caffeine Energy Drinks

21.0 25.0 15.0 21.5 35.7 15.0 33.1 11.7 16.1 31.3 30.0

Compute thestandard deviationandinterquartile rangefor thetop-sellingenergy drinks. (Round your standard deviation to four decimal places.)

standard deviation= _______mg caffeine per ounce

interquartile range= _______mg caffeine per ounce

Compute thestandard deviationandinterquartile rangefor thehigh-caffeineenergy drinks. (Round your standard deviation to four decimal places.)

standard deviation=____mg caffeine per ounce

interquartile range=____mg caffeine per ounce