A small random sample of respondents has been selected for a study of the ways that iPhone owners use their apps. Specifically, a research firm is comparing the apps for Starbucks, Amazon.com, and...

A small random sample of respondents has been selected for a study of the ways that iPhone owners use their apps. Specifically, a research firm is comparing the apps for Starbucks, Amazon.com, and Yelp. Are there statistically significant differences by app for any of the variables listed here?

Percent of battery used by the app in the last 24  hours