An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below. Under Age of 18 Over Age of 18 n1 = 500 n2 = 600 Number of accidents = 150 Number of accidents = 160 We are interested in determining if the accident proportions differ between the two age groups. Calculate the test statistic of the Hypothesis Test about p1 – p2      2.139   1.224   1.239   3.220

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