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exam3sampleanswers - 1 MAT121 Fall 2007 Exam 3 Rimmer -...

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Unformatted text preview: 1 MAT121 Fall 2007 Exam 3 Rimmer - Chapter 7 and 8 Name_________________________ December 6, 2007 Multiple Choice. Use the Scantron to mark the letter of the response that best answers each problem. There are 16 questions but your score will be out of 15 (you can miss one and still get a perfect score for this section). If anything is unclear, bring it to my attention. 1. The score on a college placement exam is normally distributed with mean 500 and standard deviation 100. Seventy-five percent of the test takers score above what? a) 264 b) 338 c) 433 d) 472 e) 560 2. The graduation rate for seniors at a certain university in any particular year is, on average, 72.1% and is normally distributed. The population standard deviation is 3.5%. What is the probability, in any given year, that between 79.1% and 82.6% of the seniors will graduate? a) 0.0214 b) 0.047 c) 0.27 d) 0.0235 e) 0.135 3. Your score on a statistics exam was 82%. The class average was 79%. Your standardized score ( z-score) will necessarily be a) Less than zero b) Greater than zero c) Zero d) Undefined e) More than one standard deviation above the mean 4. Jose received an 82 on his math exam. 73 and 8 = = for the entire class....
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exam3sampleanswers - 1 MAT121 Fall 2007 Exam 3 Rimmer -...

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