Please Show Steps/Equations Used. Thank you. I need FAST reply. 10. Exercise 9.1

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Please Show Steps/Equations Used. Thank you. I need FAST reply.

10. Exercise 9.13 THE VIDEO GAME SATISFACTION RATING CASE Recall that "very satisfied" customers give the XYZ-Box video game system a rating that is at least 42 Suppose that the manufacturer of the XYZ-Box wishes to use the random sample of 64 satisfaction ratings to provide evidence supporting the claimthat the mean composite satisfaction rating for the XYZ-Box exceeds 42 (a) Letting represent the mean composite satisfaction rating for the XYZ-Box, set up the null hypothesis Ho and the alternative hypothesis Ha needed if we wish to attempt to provide evidencesupporting the claim that exceeds 42. Ho: | (Click to select) | 42 versus Ha: (Click to select) | 42. (b) The random sample of 64 satisfaction ratings yields a sample mean of R= 42.970 Assuming that equals 2.67 use critical values to test Ho versus Ha at each of = .10, .05, .01, and .001. (Round your answer Z05 to 3 decimal places and other z-scores to 2 decimal places.) Rejection points Z.10 Z 05 Z,01 Z,001

Explanation / Answer

H0<=42

Ha >42

Mean=42.97

SD=2.67

N=64

Test for .1

b) 42.42 to 43.52

Test for .05

42.32 to 43.62

Test for .01

42.11 to 43.83

Test for .001

41.87 to 44.07

We can accept H0 at all the values except .001

D) Very strong

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