Question: A random sample of 30 lunch orders at Noodles and
A random sample of 30 lunch orders at Noodles and Company showed a standard deviation of $5.31. Find the 90 percent confidence interval for the population standard deviation. Use Excel to obtain X2L = CHISQ.INV(α/2,d.f.) and X2U = CHISQ.INV.RT( /2,d.f.)
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