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Grand Canyon BUS 352 Week 7 Problem Set and DQs

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Grand Canyon BUS 352 Week 7 Problem Set and DQs

Grand Canyon BUS 352 MOD 7 DQ 1

Describe when a z-test should be performed as opposed to a t-test? Which (if any) can we use all the time? Why or why not?

Grand Canyon BUS 352 MOD 7 DQ 2

Your manager, who just read an abridged version of a statistics book, wants you to test hypotheses for the difference in two population means. The sample sizes for each are 23. He is adamant that you perform a z-test. What would you tell him? What specific explanation would you give?

Grand Canyon BUS 352 Week 7 Problem Set 7

Details:
Complete exercises 10.9 (parts a, b and c only), 10.11 (parts a and b only), 10.21 (parts a and b only), 10.23, 10.49Please note: the files needed to complete the assignments are located in Course Materials (Course Add-Ons). You will need:

• For 10.9, the “Phone” file.

• For 10.11, the “Digitalcameras” file.

• For 10.21, the “Measurement” file.

• For 10.23, the “Ad Pages” file.

• For 10.49, the “Digital Cameras” file.

The exercises above require the use of the t-test functions within the Data Analysis menu in Excel. Refer to Appendix E10 for instructions on using Excel for these exercises.

For problems requiring computations, please ensure that your Excel file includes the associated cell computations and/or statistics output; this information is needed in order to receive full credit on these problems.

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