A procurement specialist has purchased 25 resistors from vendor 1 and 35 resistors from vendor 2. Each

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A procurement specialist has purchased 25 resistors from vendor 1 and 35 resistors from vendor 2. Each resistor€™s resistance is measured with the following results:

(a) What distributional assumption is needed to test the claim that the variance of resistance of product from vendor 1 is not significantly different from the variance of resistance of product from vendor 2? Perform a graphical procedure to check this assumption.
(b) Perform an appropriate statistical hypothesis-testing procedure to determine whether the procurement specialist can claim that the variance of resistance of product from vendor 1 is significantly different from the variance of resistance of product from vendor 2.

Vendor 1 96.8 100.0 100.3 98.5 98.3 98.2 103.7 99.6 99.4 99.9 101.1 97.7 99.7 97.7 98.6 101.1 101.9 101.0 99.1 99.4 99.8
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Applied Statistics And Probability For Engineers

ISBN: 9781118539712

6th Edition

Authors: Douglas C. Montgomery, George C. Runger

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