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Two processes for manufacturing large roller bearings are under study. In both cases, the diameters (in...

Two processes for manufacturing large roller bearings are under study. In both cases, the diameters (in centimeters) are being examined. A random sample of 26 roller bearings from the old manufacturing process showed the sample variance of diameters to be

s2 = 0.25.

Another random sample of 29 roller bearings from the new manufacturing process showed the sample variance of their diameters to be

s2 = 0.14.

Use a 5% level of significance to test the claim that there is a difference (either way) in the population variances between the old and new manufacturing processes.

(ii) Find the sample test statistic. (Round your answer to two decimal places.)

Math   Statistics-And-Probability   
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