Statement of a problem № m158


A Washington, D.C., “think tank” announces the typical teenager sent 50 text messages per day in 2013. To update that estimate, you phone a sample of 12 teenagers and ask them how many text messages they sent the previous day. Their responses were:  At the .05 level, can you conclude that the mean number is greater than 50? Estimate the pvalue and describe what it tellsyou.

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