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OpenStudy (anonymous):
A study of six hundred adults found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 17 hours. The population standard deviation is 6 hours. What is the margin of error for a 95% confidence interval?
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OpenStudy (anonymous):
Ive been trying to solve this for 3 hours.. can someone explain it to me step-by-step please
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