Construct an 99% confidence interval for the variance for a random sample of 30 data points with an average of 25.4 with a sample standard deviation of 2.89.
Added by Susana D.
Step 1
First, we need to find the critical value for a 99% confidence interval with 29 degrees of freedom (n-1). We can use a t-distribution table or a calculator to find this value. The critical value is 2.756. Show more…
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