Question

Quality Assurance (Read this entire document before beginning the assignment) You work for Frito-Lay in the quality assurance lab. You have just taken several samples from the Doritos production line for the 32 ounce bag of Nacho Cheese Doritos. You have 50 bags of Nacho Cheese Doritos sampled from the first shift of production for the day. You have weighed each bag and the weights of the bags are listed below. Sample bag weights for fifty — 32 oz. bags of Nacho Cheese Doritos (N=50)

31.51 30.94 32.24 30.75 30.77 33.11 32.02 32.97 30.48 32.22 33.16 32.41 31.26 33.45 32.36 31.02 31.13 30.51 33.11 31.37

30.67 31.42 33.12 31.24 32.15 32.51 31.84 30.92 33.11 32.12 30.61 31.24 32.04 31.25 31.93 32.05 31.32 31.12 31.03 29.87

31.27 32.06 31.03 32.03 32.19 31.17 32.01 31.45 32.31 31.15 1.

1. You want to determine if the average weight of the actual sample bags is significantly different from the desired weight. Is any difference due to random error (just dumb luck) or due to some other potential cause? Should you test a NULL or DIRECTIONAL hypothesis; and EXPLAIN WHY (using correct nomenclature):

. 2. State a plausible hypothesis in prose/narrative form to test for this situation: (You want to be 95% certain of your conclusion—include the alpha level)

3.Express (show) your hypothesis as a mathematical expression and explain it using proper nomenclature:

4. Review Section/Chapter 7 of “SPSS Stats Practically Short and Simple” (from assigned reading list for this week). There are 7 different inferential statistical tests explained in the chapter. Identify the one which is appropriate for use in this assignment (and WHY), and then explain why at least one of the other tests there is NOT appropriate (in your own words). Use proper statistical and data terminology to explain your reasoning. Test your hypothesis stated above here:

5. Restate the prose based hypothesis (from # 2 above), and then make your conclusion / decision having now run the statistical test:

6. Based on the statistical data generated by SPSS, do you REJECT or FAIL TO REJECT your hypothesis? (select one)

7. Explain your decision above (from a statistical perspective using the data to support it):

8. What should be done (that is what managerial/operational decision should be made) as a result of your statistical analysis? That is how do you convert a statistical decision into an operational (“Business” decision)

9. Include (attach) your SPSS data (instructions described in CH 1 of SPSS: Stats Practically Short and Simple; (and elsewhere). You can even use “Sniping Tool” (or any other method) for inclusion. At minimum include the following appendices:

Appendix A: The appropriate output boxes showing the results of your statistical test

Appendix B: The data array (the SPSS data matrix) (evidence of “dressing up” the output by using features in SPSS to name / ID the data required to full credit) Appendices (provide below)

Answer 1

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