Education: Exams Professor Fair believes that extra time does not improve grades on exams. He randomly divided

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Education: Exams Professor Fair believes that extra time does not improve grades on exams. He randomly divided a group of 300 students into two groups and gave them all the same test. One group had exactly 1 hour in which to finish the test, and the other group could stay as long as desired. The results are shown in the following table. Test at the 0.01 level of significance that time to complete a test and test results are independent.

Time A B C F Row Total 1 h 23 42 65 12 142 Unlimited 17 48 85 8 158 Column Total 40 90 150 20 300 AppendixLO1

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Understandable Statistics Concepts And Methods

ISBN: 9780357719176

13th Edition

Authors: Charles Henry Brase, Corrinne Pellillo Brase

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