Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 66 weekly reports showed a sample mean of 17.5 customer contacts per week. The sample standard deviation was 4.2.
Provide a 90% confidence interval for the population mean number of weekly customer contacts for the sales personnel. (Round your answers to two decimal places.)
contacts/week to contacts/week
Provide 95% confidence interval for the population mean number of weekly customer contacts for the sales personnel. (Round your answers to two decimal places.)
contacts/week to contacts/week
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