In order to compare the means of two normal populations that are known to have equal variances, independent random samples are taken of sizes n = 10 and n2 data yield: = 15. The results from the sample Sample 1 Sample 2. sample mean = 52 sample mean = 45 S1 = 5 S2 =3 Sp 3.9065 %3D To test the null hypothesis Ho: H1- H2 =0 versus the alternative hypothesis H,: µ1 -µ2 > 0 at the 0.01 level of significance, the most accurate statement is O The value of the test statistic is -8.48 and the critical value is -2.5 O The value of the test statistic is 4.39 and the critical value is 1.96 O The value of the test statistic is -4.39 and the critical value is -1.96 O The value of the test statistic is 3.79 and the critical value is 2.326 E tho test statistic is 8.48 and the critical value is +2,50

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