In order to compare the means of two populations, independent random samples of size 400 observations are selected from each population with the following results: Sample 1 Sample 2 Sample Mean = 5275 Sample Mean = 5240 %3D S1=150 S2 200 n1 = 400 n2 = 400 Assume equal variances for the populations. To test the null hypothesis Ho: H1- H2 = 0 versus the alternative hypothesis H H1-2=0 at the 0.05 level of significance, the most accurate statement is O The value of the test statistic is 3.29 and the critical value is +1.645 The value of the test statistic is 3.29 and the critical values are +1.645 and-1.645 The value of the test statistic is 2.80 and the critical values are +1.645 and -1.645 The value of the test statistic is 2.80 and the critical value is +1.96 The value of the test statistic is 2.80 and the critical values are +1.96 and -1.96

In order to compare the means of two populations, independent random samples of size 400 observations are selected from each population with the following results: Sample 1 Sample 2 Sample Mean = 5275 Sample Mean = 5240 %3D S1=150 S2 200 n1 = 400 n2 = 400 Assume equal variances for the populations. To test the null hypothesis Ho: H1- H2 = 0 versus the alternative hypothesis H H1-2=0 at the 0.05 level of significance, the most accurate statement is O The value of the test statistic is 3.29 and the critical value is +1.645 The value of the test statistic is 3.29 and the critical values are +1.645 and-1.645 The value of the test statistic is 2.80 and the critical values are +1.645 and -1.645 The value of the test statistic is 2.80 and the critical value is +1.96 The value of the test statistic is 2.80 and the critical values are +1.96 and -1.96

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.2: Expected Value And Variance Of Continuous Random Variables

Problem 10E

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