Answered: To see whether silicon chip sales are…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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To see whether silicon chip sales are independent of where the XYZ country’s economy is in the business cycle, data have been collected on the weekly sales of ABC firm, and on whether the economy was rising to a cycle peak, at a cycle peak, falling to a cycle trough, or at a cycle trough. The results are given in the table below. State the null and alternative hypotheses.
Calculate the appropriate test statistic and conduct the test of hypothesis at 0.01 level of significance, what is your conclusion?

WEEKLY CHIP SALES
Total
Economy High Mediun
Low
At Peak
43
15
13
71
At Trough
64
86
64
214
43
75
Rising
Falling
17
15
64
17
19
101
Total
214
135
111
460

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