Mathematics, 19.07.2019 23:00 Okaytashy
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 20 hours. the population standard deviation is 2 hours. what is the 95% confidence interval for the mean? a.19.88−20.12 hours b.19.76−10.24 hours c.19.88−20 hours d.20−20.12 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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