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Mathematics, 09.11.2020 16:50 skylarwise121

A survey of 80 randomly selected companies asked them to report the annual income of their presidents. Assuming that incomes are normally distributed with a standard deviation of $30,000, determine the 90% confidence interval estimate of the mean annual income of all company presidents. Interpret the statistical results.

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A survey of 80 randomly selected companies asked them to report the annual income of their president...
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