Question: Find a 95% confidence interval for the variance of a normal population from the sample: Ultimate tensile strength (k psi) of alloy steel (Maraging H)

Find a 95% confidence interval for the variance of a normal population from the sample:

Ultimate tensile strength (k psi) of alloy steel (Maraging H) at room temperature: 251, 255, 258, 253, 253, 252, 250, 252, 255, 256

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n 1 9 degrees of freedom Fc 1 0025 c 1 270 Fc 2 0975 c 2 1902 from Table A10 From the sample x 2535 9s 2 545 Hence k 1 545270 2019 k 2 5451902 287 Fro... View full answer

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