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A Lumber Company Has Claimed That the Standard Deviation for the Lengths

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A lumber company has claimed that the standard deviation for the lengths of their 6 foot boards is 0.5 inches or less. To test their claim, a random sample of 17 six-foot boards is selected; and it is determined that the standard deviation of the sample is 0.4. Do the results of the sample support the company's claim? Use α\alpha = 0.1.

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Since blured image2 = 25 > 23.54,...

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