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The weekly sales of an online seller are distributed according to a normal property, with a standard deviation of 973 pesos. A statistical study of

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The weekly sales of an online seller are distributed according to a normal property, with a standard deviation of 973 pesos. A statistical study of sales in the last 10 weeks has found a confidence interval for the mean weekly sales with extremes of 4, 633, and 5, 839 pesos. What is the confidence level used in this problem? A 99% B 95% 90% D Not among the choices E 85%

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