Apet food producer manufactures and then fills 25-pound bags of dog food on two different production lines located in separate cities. in an effort to determine whether differences exist between the average fill rates for the two lines, a random sample of 20 bags from line 1 and a random sample of 25 bags from line 2 were recently selected. each bag's weight was measured and the following summary measures from the samples are reported: production line 1 production line 2 sample size 20 25 sample mean weight (lbs.) 25.72 25.67 due to extensive record-keeping, the population standard deviations for both production lines are known: o = .07 for production line 1 and o= .05 for production line 2. construct a 97% confidence interval estimate of the average difference in fill weights for the 2 production lines. s (click to select) as (click to select) a (report your answers to 2 decimal places, using conventional (click to select) a rounding rules.) assume that you are interested in testing whether or not the average fill weight of production line 1 is significantly different than that of production line 2. the p-value of the hypothesis test would be (when calculating your answer, round your test statistic to 2 decimal places, and then report your p-value answer to 4 decimal places, using conventional rounding rules.) assume that you are interested in testing whether or not the average fill weight of production line 1 is significantly different than that of production line 2. using the p-value you just calculated, at 95% confidence, the best and proper conclusion is that (click to select)