statistics midterm

statistics midterm - 120_2f00 :

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Unformatted text preview: 120_2f00 : ____________________________________________________ : ____________________________ : ____________________________________________________ : ____________________________ __________________________________________________________________________________________________________________________________ Second Exam QM 120 - Fall 2000/2001 Question One : To test the average length of life measured in hours for grade A battery, the manufacturer selected 25 batteries at random, the data are given below 50, 38, 56, 48, 41, 50, 51, 52, 60, 46, 41, 53, 65, 42, 37, 50, 45, 52, 56, 51, 52, 43, 38, 33, 50. Use Minitab Output to answer the following questions MTB > describe c1 Variable N Mean Median TrMean StDev SE Mean C1 25 48.00 50.00 47.91 7.60 1.52 Variable Minimum Maximum Q1 Q3 C1 33.00 65.00 41.50 52.00 MTB > sort c1 c2 MTB > print c2 33 37 38 38 41 41 42 43 45 46 48 50 50 50 50 51 51 52 52 52 53 56 56 60 65 MTB > let k1=mean (c1)-2*stdev(c1) MTB > let k2=mean(c1)+2*stdev(c1)...
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statistics midterm - 120_2f00 :

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