In a recent study of enterprise resource planning (ERP) system effectiveness, re

Question

In a recent study of enterprise resource planning (ERP) system effectiveness, researchers asked companies how they assessed the success of their ERP systems Out of 410 manufacturing companies surveyed they found that 213 used return on investment (ROI), 160 used reductions in inventory levels, 26 used improved data quality, and 11 used on-time delivery In a survey of 230 service firms. 50 used ROI. 60 used inventory levels. 100 used improved data quality, and 20 used on-time delivery. Is there evidence that the measures used to assess ERP system effectiveness differ between service and manufacturing firms? Perform the appropriate test and state your conclusion State the null and alternative hypothesis Choose the correct answer below H_0: The proportions of assessment method are the same for each industry sector H_A: The proportion of assessment method is different for at least one industry sector H_0: The method of assessment is independent of industry sector H_A: There is an association between assessment method and industry sector H_0: There is no pattern in the assessment method by industry sectors H_A: There is a pattern in the assessment method by industry sectors Determine the x^2 statistic. (Round to three decimal places as needed) Enter your answer in the answer box and then click Check

Explanation / Answer

1) clicked on rigth answer

2)

chi square =154.116

Observed O ROI red. Invent improved data on time Total manufacturing 213 160 26 11 410 Service 50 60 100 20 230 Total 263 220 126 31 640 Expected E=rowtotal*column total/grand total ROI red. Invent improved data on time Total manufacturing 168.484 140.938 80.719 19.859 410 Service 94.516 79.063 45.281 11.141 230 Total 263 220 126 31 640 chi square =(O-E)^2/E ROI red. Invent improved data on time Total manufacturing 11.762 2.578 37.094 3.952 55.386 Service 20.966 4.596 66.123 7.045 98.731 Total 32.728 7.174 103.217 10.997 154.116

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