A random sampleof n = 9 wheels of cheese yielded the following weights in pounds, assumed to be
21.50 18.95 19.40 19.15 22.35 22.90 22.20 23.10
(a) Give a point estimate for σ.
(b) Find a 95% confidence intervalfor σ and then find a 90% confidence interval for σ.
This solution provides steps necessary to determine the point estimate, confidence intervals and standard deviation.