The milling machine in the fabrication department of your company produces a very important part for the products you sell. You are given the following historical data on the machine (from a SAMPLE of n = 25 weeks): Machine Breakdowns/week (X) Number of parts Produced/week (Y) average # of machine breakdowns/week: X bar 50 average # of parts produced/week: Y bar 170 standard deviation of # of machine breakdowns/week: Sx - 15 n = 25 standard deviation of # of parts produced/werk: Sy = 40 n = 25 Compare an 80% confidence interval for the mean number of parts produced to a 95% confidence interval for the mean number of parts produced.