Mathematics, 29.07.2020 01:01 TrivialRen1894

Mrs. Smith believes that if she orders her test questions from hard to easy, she will reduce the standard deviation of scores. Mr. King gave a test where he did not order the questions, and his standard deviation was 3.4. Mrs. Smith gave her 40 students the exact same test, but she ordered the questions, and her standard deviation was 2.8. At a = 0.01, test that Mrs. Smith's standard deviation is lower than 3.4. H P-value 7.)H_ Conclusion:

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Mrs. Smith believes that if she orders her test questions from hard to easy, she will reduce the sta...