19) Management of Melodic Kortholt Company compared absenteeism rates in two plants 19) on the third Monday in November. Of Plant A's 800 employees, 120 were absent. Of Plant B's 1200 employees, 144 were absent. MegaStat's results for a two-tailed test are shown below. p1 p2 0:15 0.12 p (as decimal) 120/800 144/1200 p (as fraction) 120. 144. X 800 1200 n 0.03 sample difference 0.00 hypothesized difference 0.01545 std. error X.XX Z 0522 p-value (two-tailed) The test statistic (shown as z = x.XX) is approximately: A) 1.942 B) 1.645 C) 2.022 D) 1.960 20) A new policy of "flex hours" is proposed. Random sampling showed that 28 of 50 20) female workers favored the change, while 22 of 50 male workers favored the change. Management wonders if there is a difference between the two groups. What is the test statistic to test for a zero difference in the population proportions? A) -1.255 B) 1.200 C) 1.321 D) 1.287