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stat_exam2a_99 - Exam#2 Form A Statistics 211(Fall 1999...

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Exam #2 Form A - Statistics 211 (Fall 1999) This test consists of seven numbered pages. Make sure you have all 7 pages. It is your responsibility to inform me if a page is missing!!! You have 75 minutes to complete this test. Make sure you fill out and “bubble in” the following items on the scantron sheet: – Last Name, First Name, MI. – Dept (STAT), Course No (211), Section (504). – Social Security Number (enter your Student ID). – Test Form (A or B). – Enter the exam number, sign and date the form. You will loose credit if you fail to fill out your scantron form correctly. You may use the standard 5 page crib sheet from the web site, all appropriate tables and a calculator. If I provide partial results—assume they are correct and use them even if they are not. If there is no correct answer or if multiple answers are correct, select the best answer. There is no penalty to wrong answers . . . so guess if you do not know an answer. It is your responsibility to look at the overhead or blackboard about every 15 minutes and to incorporate any relevant information into your test. You can keep this exam! 1
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Fill out your scantron sheet properly. See the header page of this exam for instructions. Chapter 4 [1] Φ(2) = a) 0.0228 b) 0.4207 c) 0.5793 d) 0.5940 e) 0.9772 [2] The 80’th percentile of the Standard Normal Distribution is: [3] If GPA at Texas A&M is distributed X N ( μ = 2 , σ = 0 . 8) then what GPA must you have to be in the 90th percentile (select the closest answer)? [4] If SAT scores have a normal distribution with a mean of 500 and a standard deviation of 100, then what is the probability a randomly chosen student will score greater than 750? [5] The Continuity Correction is: a) a “fudge factor” that makes calculations easier. b) is always .5! c) can only be used if np 5 and nq > 5. d) the correction for discreteness of the underlying distribution. e) only applies when n 30.
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