BUS 308 Week 4 assignment_ 9.13_9.22_and 12.10_12.18(a)
9.13Recall that “very satisfied” customers gave 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 65 satisfaction ratings to provide evidence supporting the claim that 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 and the alternative hypothesis needed if we wish to attempt to provide evidence supporting the claim that exceeds 42.

b. The random sample of 65 satisfaction ratings yields a sample mean of x = 42.954. Assuming that equals to 2.65, use critical values to test versus at each of a = .10, .05, .01, and .001.
z = [ (42.954 – 42) / (2.64 / 65 ] = 2.91

Reject Points

Since 1.28<1.645<2.33<2.91<3.09, reject with =.10, .05, .01, but not with .001. c. Using the information in part b, calculate the p-value and use it to test versus At each of a = .10, .05, .01, and .001

p-value
Since p-value = .0018 is less than .10, .05, and .01, reject at those levels of , but not with it ( =.001). d. How much evidence is there that the mean composite satisfaction rating exceeds 42? There is a lot of evidence that the mean composite satisfaction rating exceeds 42.

9.22How do we decide whether to use a Z test or a T test when testing a hypothesis about a population mean? a. Z and T test are used when testing the hypothesis. When the hypothesis uses proportions you use the z test. When the hypothesis uses means you use the T test.

12.10A wholesaler has recently developed a computerized sales invoicing system. Prior to implementing this system, a manual system was used. The distribution of the number of errors per invoice for the manual system is as follows:

...Running head: WEEK4ASSIGNMENT 1
Week4Assignment
Sarah Doppelmayr
Statistics for Managers
BUS308
Edward Kaplan
January 28, 2013
WEEK4ASSIGNMENT 2
Week4Assignment
Chapter 9: 9.13 Recall that “very satisfied” customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer...

...Week4AssignmentBUS308 Statistics for Managers
January 28, 2013
9.13) Recall that “very satisfied” customers give XYZ-Box video game system a ratting at least 42. Suppose that the manufacturer of XYZ-Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ-Box exceeds 42.
a. Letting u represent the mean composite...

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Nominal
Ordinal
Interval
Ratio
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...Ed). New York, NY: McGraw-Hill
Huy, Q. N. 2001. Time, temporal capability, and planned change.
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Kanter, R. M., Stein, B. A., & Jick, T. D. (1992). The challenge of organizational change. New York, NY: Free Press.
Levasseur, R. E. (2001). People Skills:Change Management Tools--Lewin's Change Model. Interfaces, 31(4), 71.
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BUS308 STATISTICS FOR AMANAGERS
BUS308Week 1 DQ 1 Language
Numbers and measurements are the language of business.. Organizations look at results, expenses, quality levels, efficiencies, time, costs, etc. What measures does your department keep track of ? How are the measures collected, and how are they summarized/described? How are they used in making decisions? (Note: If you do not have a job where...