pam2100 section_problems_2_fall10

pam2100 section_problems_2_fall10 - = 4.8. How high must a...

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Section Problems #2 From book: 1.136 (page 75) Express your answers as proportions instead of percents. Round your final answers to four decimal places. 1.139 (page 75) Express your answers as proportions instead of percents. Round your final answers to four decimal places. For part c , use the z-score associated with the cumulative proportion that is as close as possible to 0.8. #1) ACT scores are distributed normally with a mean μ = 26 and a standard deviation σ = 4.8. What score would a student have to achieve in order to score as close as possible to the 70 th percentile (according to Table A)? Use a z-score that is actually listed in Table A. Round your answer to three decimal places. #2) ACT scores are distributed normally with a mean μ = 26 and a standard deviation
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Unformatted text preview: = 4.8. How high must a student score in order to place in the top 20% of students taking the ACT test (according to Table A)? Use a z-score that is actually listed in Table A. Round your answer to three decimal places. #3) The mean of x = 11 and the standard deviation of x = 7. The variable x is linearly transformed such that x new = 6 x . What is the mean of x new ? What is the standard deviation of x new ? #4) The mean of x = 10 and the standard deviation of x = 4. The variable x is linearly transformed such that x new = a + b x. The mean of x new = 35 and standard deviation of x new = 12. Suppose b is a positive number. What does a equal? What does b equal?...
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This note was uploaded on 10/17/2010 for the course PAM 2100 taught by Professor Lewis during the Spring '10 term at Adelphi.

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