Select the best answer, then click the \'Submit Answer\' button or press on your

Question

Select the best answer, then click the 'Submit Answer' button or press on your keyboard. You will be allowed to answer (and must answer) any skipped questions before the test is scored. A process engineer performed an experiment to see if there was a difference in the drying time of two different materials. The null and alternative hypothesis used for the test is shown here. The sample size for material 1 was 8 units and the sample size for material 2 was 12 units The value of the test statistic was t = 2.34. Which one of the >h= correct decision? H_0: mu_1 - mu_2 = 0 H_1: mu_1 - mu_2 notequalto 0 Reject the null hypothesis at a =.05 because 2.34 > 2.086 Accept the null hypothesis at a =.02 because 2.34

Explanation / Answer

The critical value of t(0.05,n+m-2)

=t(0.05,18)

=+/-2.101

Reject the null hypothesis at alpha=0.05 because 2.34>2.101

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