In order to estimate the average cell phone minutes per day…
In order to estimate the average cell phone minutes per day for teens throughout the U.S., you compute the mean cell phone minutes per day for 500 teens. All U.S. teens are the [answer1], the 500 teens are the [answer2], the average cell phone minutes per day throughout the U.S. is the [answer3], and the mean cell phone minutes per day the 500 teens is the [answer4].
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