A specialty company manufactures ceramic brake pads for use in passenger aircraft brakes, and they have to meet certain strength requirements. The company makes these pads at two facilities, one in Kansas and the other in Florida. Ideally, these two facilities should be manufacturing pads to the same consistent quality. Two samples were obtained from the facilities, and the sample statistics are shown below. Kansas Florida Number of pads = 240 mean = 688.9987 standard deviation = 65.54909 Number of pads = 240 mean = 611.1559 standard deviation = 61.85425 Based on the data, and at a 5% level of significance, is there any difference in the variability of the strength of pads produced by these two facilities?

Question

A specialty company manufactures ceramic brake pads for use in passenger aircraft
brakes, and they have to meet certain strength requirements. The company makes these pads at
two facilities, one in Kansas and the other in Florida. Ideally, these two facilities should be
manufacturing pads to the same consistent quality. Two samples were obtained from the facilities,
and the sample statistics are shown below.

Kansas Florida
Number of pads = 240
mean = 688.9987
standard deviation = 65.54909
Number of pads = 240
mean = 611.1559
standard deviation = 61.85425
Based on the data, and at a 5% level of significance, is there any difference in the variability of
the strength of pads produced by these two facilities?

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