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The HO and H1 for testing that the students have a lower mark before the course are : What is the decision rule at the 5% level of significance for testing the hypothesis that the course improved exam results? What is the value of the sample mean difference (D bar) when the results of the exam before the course is (pop. 1) and the results of the exam after the course is (pop. 2). The value of the standard deviation of the difference scores is: The calculated test statistic is: The conclusion for this hypothesis test would be:

The HO and H1 for testing that the students have a lower mark before the course are : What is the decision rule at the 5% level of significance for testing the hypothesis that the course improved exam results? What is the value of the sample mean difference (D bar) when the results of the exam before the course is (pop. 1) and the results of the exam after the course is (pop. 2). The value of the standard deviation of the difference scores is: The calculated test statistic is: The conclusion for this hypothesis test would be:

College Algebra
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.4: Expected Value
Problem 31E
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Hypothesis testing Four students took an English test before and after a preparation course to test the effects of the preparation course. The exam marks before and after the course are given below. Student Before Course After Course 1 810 630 620 870 710 900 4 620 610 The H0 and H1 for testing that the students have a lower mark before the course are : What is the decision rule at the 5% level of significance for testing the hypothesis that the course improved exam results? What is the value of the sample mean difference (D bar) when the results of the exam before the course is (pop. 1) and the results of the exam after the course is (pop. 2). The value of the standard deviation of the difference scores is: The calculated test statistic is: The conclusion for this hypothesis test would be:
Transcribed Image Text:Hypothesis testing Four students took an English test before and after a preparation course to test the effects of the preparation course. The exam marks before and after the course are given below. Student Before Course After Course 1 810 630 620 870 710 900 4 620 610 The H0 and H1 for testing that the students have a lower mark before the course are : What is the decision rule at the 5% level of significance for testing the hypothesis that the course improved exam results? What is the value of the sample mean difference (D bar) when the results of the exam before the course is (pop. 1) and the results of the exam after the course is (pop. 2). The value of the standard deviation of the difference scores is: The calculated test statistic is: The conclusion for this hypothesis test would be:
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