Use the confidence interval to find the estimated margin of error. Then find the sample mean.
Book Prices: A store manager reports a confidence interval of (44.07 & 80.97) when estimating the mean price (in dollars) for the population of textbooks.
Margin of error = 80.97 -44.07 /2 =. 36.9/2 = 18.45
Sample mean = 44.07 + 18.45 = 62.52
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