Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 75  weekly reports showed a sample mean of 17.5 customer contacts per week. The sample standard deviation was 5.2 . 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:   95% confidence interval, to 2 decimals:

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Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 75  weekly reports showed a sample mean of 17.5 customer contacts per week. The sample standard deviation was 5.2 . 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:

 

95% confidence interval, to 2 decimals:

 

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Sales personnel for Skillings Distributors submit weekly reportslisting the customer contacts made during the week. A sample of  85 weekly reports showed a sample mean of 17.5 customer contacts perweek. The sample standard deviation was 5.6. Provide 90% and 95%confidence intervals for the population mean number of weeklycustomer contacts for the sales personnel.

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