A professor is concerned that the two sections of college algebra that he teaches are not performing at the same level. To test his claim, he looks at the mean exam scorefor a random sample of students from each of his classes. In Class 1, the mean exam score for 18 students is 77.7 with a standard deviation of 3.6. In Class 2, the meanexam score for 11 students is 81.9 with a standard deviation of 6.6. Test the professor's claim at the 0.01 level of significance. Assume that both populations areapproximately normal and that the population variances are equal. Let Class 1 be Population 1 and let Class 2 be Population 2.Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places.

Answered: A professor is concerned that the two…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A professor believes that, for the introductory art history classes at his university, the mean test score of students in the evening classes is lower than the mean test score of students in the morning classes. He collects data from a random sample of 250 students in evening classes and finds that they have a mean test score of 76.8. He knows the population standard deviation for the evening classes to be 7.2 points. A random sample of 200 students from morning classes results in a mean test score of 77.8. He knows the population standard deviation for the morning classes to be 1.9 points. Test his claim with a 90% level of confidence. Let students in the evening classes be Population 1 and let students in the morning classes be Population 2. Step 1 of 3 : State the null and alternative hypotheses for the test. Fill in the blank below. H0: μ1=μ2 Ha: μ1__μ2
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