In a study of proctored and nonproctored tests in an online Intermediate Algebra course, researchers obtained the data for test results given below (based on “Analysis of Proctored versus Non-proctored Tests in Online Algebra Courses,” by Flesch and Ostler, MathAMATYC Educator, Vol. 2, No. 1). Use a 0.01 significance level to test the claim that students taking nonproctored tests get a higher mean than those taking proctored tests. Group 1 (Proctored): ? = 30, ?̅= 74.30, ? = 12.87 Group 2 (Nonproctored): ? = 32, ?̅= 88.62, ? = 22.09

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