3. O valor de (2)3 + (16)2 é: a)264 b)336 c)1056 d)2568 4) o valor de 73.23 é: a)4.444 b)2744 c)1.744 d)3.744 5) o valor de 124 é: a)20.636 b)48 c)20.736 d)20.836

Sales personnel for skillings distributors submit weekly reports listing the customer contacts made during the week. a sample of 55 weekly reports showed a sample mean of 17.5 customer contacts per week. the sample standard deviation was 5.8. provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. a. 90% confidence interval, to 2 decimals b. 95% confidence interval, to 2 decimals