Calculate the two-sided 95% confidence interval for the population standard deviation (sigma) given that a sample of size n=8 yields a sample standard deviation of 14.78. 10.68 < sigma < 32.96 9.77 < sigma < 30.08 7.35 < sigma < 59.87 7.39 < sigma < 30.25 7.27 < sigma < 3.52 10.58 < sigma < 48.91 13.79 < sigma < 36.92 8.30 < sigma < 9.16 18.99 < sigma < 22.09 1.51 < sigma < 23.59
Added by Michelle S.
Step 1
Since n=8, we have 7 degrees of freedom. Using a t-table or calculator, we find the critical values to be 2.365 and -2.365. Show more…
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