Mathematics, 05.01.2020 06:31 bella8751

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 10 hours. the population standard deviation is 2 hours. what is the 95% confidence interval for the mean?
a) 9.88-10
b) 10-10.12
c) 9.88-10.12
d) 9.76-10.24

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