If the Constant of Proportionality between X and Y is 2.5, which equation represents their relationship? A) Y = 2.5X

B) 2Y = 5X

C) 5Y = 2X

D) Y = X ÷ 2.5

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