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...

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%.