A Single Population Mean Using the Student's t-Distribution · Exercise 11
One hundred eight Americans were surveyed to determine the number of hours they spend watching television each month. It was revealed that they watch an average of 151 hours each month, with a standard deviation of 32 hours. Assume that the underlying population distribution is normal.
Why would the error bound change if the confidence level were lowered to 95 percent?
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OpenStax, Statistics · §8.2 A Single Population Mean Using the Student's t-Distribution · Exercise 11
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