In problem 6.57, if the sample size was 20 with the same statistics, determine the confidence intervals on the mean of the weight of buttercups for the given confidence levels.
problem 6.57
To determine the confidence interval on the mean weight of filled buttercups, 40 samples are measured and found to have a mean value of 8 oz and a standard deviation of 0.2 oz. Determine the confidence interval on the mean weight of buttercups with confidence levels of 90%, 95%, and 99%