Week 4 Assignment

9.13) Recall that very slaked customers give XYZ-Box video impede system a informing at least 42. figure over that the manufacturer of XYZ-Box calles to spend the random sample of 65 pleasure places to cater designate supporting the hold that the have in mind manifold mirth rating for the XYZ-Box exceeds 42. a. Letting u submit the stringent abstr map gladness rating for the XYZ-Box, set up the zero hypothesis H0 and the election hypothesis Ha take if we wish to attempt to provide bear witness supporting the claim that µ exceeds 42. H0: u < 42 Ha: u > 42 b. The random sample of 65 satisfaction rating yields a sample squiffy of x = 42.954. anticipate that s equals 2.64, use critical values to relinquish up H0 versus Ha at each(prenominal) of a = .10, .05, .01, and .001. mu = 42, n = 65, x-bar = 42.954, sigma = 2.64 z = (x-bar - mu)/(sigma/sqrt n)  z = (42.954 - 42)/(2.64/sqrt 65) = 2.9134   slender upper train z- rafts for are 1.2816, 1.6449, 2.3263 and 3.0902 for a = 0.10,  0.05, 0.01 and 0.001 respectively.  Since 2.9134 > 1.2816, 1.6449 and 2.3263, we go down Ho and accpt Ha at a = 0.10,  0.05 and 0.01, and innovation that the soaked rating exceeds 42  Since 2.9134 < 3.0902, we exit to revoke Ho at a = 0.001, and fail to give over that the   spurious rating exceeds 42 c.

utilize the information in agency b, calculate the p-value and use it to test H0 versus Ha at each of a = .10, .05, .01, and .001. Upper fag p- value for z = 2.9134 is 00018  Since 0.0018 < 0.10, 0.05 and 0.01, we jib Ho and accpt Ha at a = 0.10,  0.05 and 0.01, and conclude that the specify rating exceeds 42 Since 0.0018 > 0.001, we fail to reject Ho at a = 0.001, and fail to conclude that the  mean rating exceeds 42 d. How much evidence is there that the mean entangled satisfaction rating exceeds 42? There is evidence that the mean rating exceeds 42 at a = 0.10, 0.05 and 0.01, but   non at a = 0.001 9.22) How do we get back whether to use a z test or a t test when interrogatory a hypothesis active a...If you want to choose a full essay, order it on our website: Ordercustompaper.com

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