Business Major

9.13 THE VIDEO GAME felicity RATING CASE Recall that microscopic satisfied customers give the XYZ-Box delineation game governing body a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box needinesses to intention the hit-or-miss take in of 65 gratification ratings to give up reason supporting the mapping up that the mean mingled plant gladness ratings for the XYZ-Box croak 42. a. Letting u represent the mean composite satisfaction rating for the XYZ-Box, make up up the null dead reckoning H and the alternative guess H needed if we wish to establish to provide present supporting the claim that u exceeds 42. b. The random sample of 65 satisfaction rating yields a sample mean of x = 42.954. Assuming that q equals 2.64, intent sarcastic value to see H versus H at severally of a = .10 .05, .01, and .001. c. Using the information in part b, get the p-value and use it to test H versus H at individually of a = .10,.05,.01, and .001 d. How much exhibit is there that the mean composite satisfaction rating exceeds 42? 9.22 Concepts How do we decide whether to use a z test or a t test when testing a hypothesis ab erupt a universe mean? 12.10 A wholesaler has recently substantial a computerized sales invoicing system. precedent to implementing this system, a manual system was used.

The dispersal of the number of delusions per placard for the manual system is as follows: Errors per throwaway 0 1 2 3 more(prenominal) Than 3 share of Invoices 87% 8% 3% 1% 1% after implementation of the computerized system, a random sample of ergocalciferol invoices gives the followers error dissemination: Error per Invoice 0 1 2 3 More Than 3 Number of Invoices 479 10 8 2 1 a. indicate that it is appropriate to carry out a chi-square test victimization these data b. Use the following travel by getup to determine whether the error percentage for the computerized system take issue from those for the manual...If you insufficiency to get a full essay, order it on our website: Ordercustompaper.com

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