A random sample of size 40 is taken from a population which has mean p1. This sample had a mean of 1973 and standard deviation 142. A random sample of size 160 is also taken from a second population which has mean [12. This second sample is found to have a mean of 2012 and standard deviation 119. Suppose it is required to test the hypothesis that m is the same as u2. Select the option that is closest to the value of the test statistic (rounded to two decimal places) which would be used in carrying out this test. Select one: O -13.32 (or 13.32) 1.22 (or 1.22) 3.37 (or 3.37) 1.33 (or 1.33) 0000 13.75 (or 13.75)