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Consider an engine parts supplier and suppose they determined that the variance of all cylindrical engine...

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Statistics

Consider an engine parts supplier and suppose they determinedthat the variance of all cylindrical engine parts diametersproduced by the current machine is .007. To reduce this variance, anew machine is designed. A random sample from the new machine istaken of 25 parts, which have a variance of .0046. At the 1%significance level, can we conclude that the new machine produces asmaller diameter variance? Please show all work hand written.

Answer & Explanation Solved by verified expert
4.3 Ratings (530 Votes)
SolutionGivenPopulation Variance Sample size n 25Sample variance s2 00046We have to test ifthe new machine produces a smallerdiameter varianceLevel of    See Answer
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