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.

New search. (Also 1294 free access solutions)

Online calculators