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

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

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?

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What is meant by the sample space of an experiment?
In a winter of an epidemic ﬂu, the parents of 2000 babies were surveyed by researchers at a well-known pharmaceutical company to determine if the company’s new medicine was effective after two days. Among 120 babies who had the ﬂu and were given the medicine, 29 were cured within two days. Among 280 babies who had the ﬂu but were not given the medicine, 56 recovered within two days. Is there any signiﬁcant indication that supports the company’s claim of the effectiveness of the medicine? Use a significance level of 0.10
In a winter of an epidemic ﬂu, the parents of 2000 babies were surveyed by researchers at a well-known pharmaceutical company to determine if the company’s new medicine was effective after two days. Among 120 babies who had the ﬂu and were given the medicine, 29 were cured within two days. Among 280 babies who had the ﬂu but were not given the medicine, 56 recovered within two days. Is there any signiﬁcant indication that supports the company’s claim of the effectiveness of the medicine? Use a significance level of 0.10 A. What type of Hypothesis Testing should be used? B. What are the null and alternative hypothesis? C. What are the significance level and type of test? D. What is the critical value? E. What is the standardized test statistic? F. What is the Statistical Decision?
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