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1 The partial results below are based on a sample of recently trained workers, to determine if the number Points:3 of hours of training time received (X, in hours) has helped in improving the time taken to troubleshoot a process problem (Y, in minutes). Summary Statistics Variable N Mean Variance Uncorrected SS Corrected SS(SSxx) X 29 6.93 6.852217 1585 191.8621 Y 29 16.58621 25.39409 8689 711.0345 Paramete r Estimates Variable Parameter Standard Estimate Error Intercept 29.58501 0.61797 Training (X) -].87545 0.08359 Standard Error 1.15784 R-Square 0.9491 What is the upper limit of the 98% condence interval estimate for the average time taken to troubleshoot a process problem, of all workers with 415.8 minutes of training time? 2 NebNas manages the credit department for a grocery store chain in the province, and she would like to Points: 3 determine whether the mean monthly balance of credit card holders is equal to 95 dollars. A random sample of 100 accounts indicated that the mean owed is 101.5 dollars with a sample standard deviation of 25.6 dollars. If she wanted to test whether the mean balance is different from 95 dollars and decided to reject the null hypothesis, what will be the p-value of the test? Type your numerical answer here. Numbers only 3 An assembly line will be shut down for maintenance if the defect rate exceeds 1.5%. Suppose you adopt Points: 3 a 2.5% significance level and take a random sample of 300 items from the assembly line and compute the proportion of defective items. For what values of the sample proportion will the assembly line be shut down