Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 65 weekly reports showed a sample mean of 19.5 customer contacts per week. The sample standard deviation was 5.2. a) What is the random variable in this narrative? b) Provide 90% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. c) Provide 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.

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