The population mean is within 5000 of the sample


Allen is an appliance salesman who works on commission. A random sample of 39 days showed that the sample standard deviation value of sales was s=$215.00. How many more days should be included in the sample to be 95% sure that the population mean is within $50.00 of the sample mean?

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Applied Statistics: The population mean is within 5000 of the sample
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