Avice president in charge of sales for a large corporation claims that the sales personnel are averaging no morethan 15 sales contacts per week. as a check on his claim, n = 36 salespersons are selected at random, and the number of weekly contacts made by each is recorded. suppose the sample mean contacts was17, and that the population variance is known to beequal to 9. answer the following questions: a)does theevidence contradict the vice president’s claim, i. e. do we have enough evidence to support the claim "the sales personnel are averaging more than 15 sales contacts per week"? use a significance level α=0.05.(assume that n=36 is large enough, so that you can apply the central limit theorem).

Which statement is true of both presidential and parliamentary systems of government? a. the executive branch operates independently from the legislative branch. b. the members of the legislative branch are directly elected by the people. c. the head of government is chosen by members of his or her political party. d. the head of government is directly elected by the people

An important application of regression analysis in accounting is in the estimation of cost. by collecting data on volume and cost and using the least squares method to develop an estimated regression equation relating volume and cost, an accountant can estimate the cost associated with a particular manufacturing volume. consider the following sample of production volumes and total cost data for a manufacturing operation. production volume (units) total cost ($) 400 4000 450 5000 550 5400 600 5900 700 6400 750 7000 compute b 1 and b 0 (to 2 decimals if necessary). b 1 b 0 complete the estimated regression equation (to 2 decimals if necessary). = + x what is the variable cost per unit produced (to 1 decimal)? $ compute the coefficient of determination (to 4 decimals). note: report r 2 between 0 and 1. r 2 = what percentage of the variation in total cost can be explained by the production volume (to 2 decimals)? % the company's production schedule shows 500 units must be produced next month. what is the estimated total cost for this operation (to 2 decimals)? $

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