Quiz 6 Sp10 - Quiz 6 Statistics 21 Spring 2010 Ibser For...

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Quiz 6 Statistics 21 Spring 2010 Ibser For questions 2 and 3 of this quiz, do the hypothesis test that you think is the most appropriate. Include null and alternative hypotheses as detailed in lecture, a test statistic (z or t), p-value, and conclusion. 1. Vincent is interested in the average math SAT score of all 3,500 seniors at Sunshine High School. The math SAT score ranges from 200 to 800 points. He surveys a simple random sample of 400 students, and finds that their average score is 710 points, with a standard deviation of 60 points. a. The average math SAT score of all 3,500 seniors at Sunshine High School is estimated as ________, and this estimate is likely to be off by _______ or so. b. Vincent correctly constructs an 84% confidence interval for the average math SAT score of all 3,500 students at SHS. What is the interval? (This interval will be referred to as Vincent’s interval throughout this problem.) c. The 84% confidence interval is (about right, not accurate) because _____________________________________________________________________ (follows, doesn’t follow) the normal curve.
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This note was uploaded on 02/08/2011 for the course STAT 21 taught by Professor Anderes during the Fall '08 term at University of California, Berkeley.

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