Compared to the cost of each share in 1960. Company
1960 Cost
2010 Cost
Company A
​$0.65
​$9.75
Company B
​$0.25
​$3.80
Company C
​$0.45
​$3.78
The cost of each share of stock in Company A was nothing times as much in 2010.
​(Type an integer or a​ decimal.)

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