Two methods are being considered to increase production of a

Last updated: 7/15/2022

Two methods are being considered to increase production of a paint manufacturing process. In a random sample of 52 days, the mean daily production using the first method was 645 tons with a standard deviation of 42 tons. In a random sample of 65 days, the mean daily production using the second method was 630 tons with a standard deviation of 44 tons. (a) Construct a 80% confidence interval for the difference in mean daily production between the two methods. Let H₁ denote the mean daily production using the first method. Use the table to find the critical value and round the answers to the nearest whole number. A 80% confidence interval for the difference in mean daily production between the two methods, in tons, is