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.

Transcribed Image Text:

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 99.8 101.2 98.2 99.6 98.6 Vendor 2 106.8 106.8 104.7 104.7 108.0 102.2 103.7 106.8 105.1 103.2 106.2 104.0 104.0 102.6 100.3 107.0 104.3 105.8 104.0 106.3 102.2 102.8 104.2 103.4 104.6 103.5 106.3 109.2 107.2 105.4 107.1 106.4 106.8 104.1 107.7