A survey of 248 retail stores revealed that the average
A survey of 248 retail stores revealed that the average price of a microwave was $375 with a standard deviation of $20. Assuming the population is normally distributed, what is the 95% confidence interval to estimate the true cost of the microwave?
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a survey of 248 retail stores revealed that the average price of a microwave was 375 with a standard deviation of 20
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