Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 85 weekly reports showed a sample mean of 17.5 customer contacts per week. The sample standard deviation was 5.4. Provide 90% and 95% confidence intervals for the population mean
number of weekly customer contacts for the sales personnel.
90% Confidence interval, to 2 decimals:
X
X
95% Confidence interval, to 2 decimals:
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