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OpenStudy (anonymous):
HELP!!! A study of one thousand teens found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 15 hours. The population standard deviation is 2 hours. What is the 95% confidence interval for the mean? 14.88−15 hours 14.88−15.12 hours 15−15.12 hours 14.76−14.24 hours
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OpenStudy (anonymous):
what do you know @JAXXDP and i can help
OpenStudy (anonymous):
?
OpenStudy (anonymous):
I don't know how to find 'confidence intervals for the mean'. I need to know how to find the hours for this..
OpenStudy (anonymous):
Then lets start there @JAXXDP
OpenStudy (anonymous):
okay.. How do we start?
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