Mathematics, 30.08.2019 20:30, AnastaziaOpfer3822
Astudy 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? . a.14.88−15 hours . b.14.88−15.12 hours . c. 15−15.12 hours . d.14.76−14.24 hours
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Astudy of one thousand teens found that the number of hours they spend on social networking sites ea...
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