These data are taken from a study on army veterans. The subjects classified according to whether they had served in Vietnam (yes-no), and whether they had sleep problems (yes-no). Sleep Problems...

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Extracted text: These data are taken from a study on army veterans. The subjects classified according to whether they had served in Vietnam (yes-no), and whether they had sleep problems (yes-no). Sleep Problems Service in Vietnam Yes (Y = 1) Yes (X = 1) No (X = 2) No (Y = 2) 599 Total 173 772 160 851 1011 Total 333 1450 1783 (a) Give the test statistic and P-value for testing (Please Show All Work): Họ: pi= p2 vs H1: pı> p2. The value of P1 is 0.224093 and P2 is 0.158259. z = ;P-value = (b) Give a 95% Confidence Interval (CI) for pi= p2. (Please Show All Work)