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stats1 - ACT scores are distributed N(22,3.3 How high must...

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Problem Set #2 SAT scores are distributed N(1120,130). What proportion of students receives scores between 1110 and 1210? (Use z-scores that actually appear in Table A. Round your final answer to four decimal places.) ACT scores are distributed N(26, 2.6). What score would a student have to achieve in order to score as close as possible to the 30 th percentile score? (Use a z-score that actually appears in Table A. Round your final answer to three decimal places).
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Unformatted text preview: ACT scores are distributed N(22,3.3). How high must a student score in order to place in the top 10% of students taking the ACT test? (Use a z-score that actually appears in Table A. Round your final answer to three decimal places). The mean of x=10 and the variance of x=9. The variable x is linearly transfored such that xnew= a +bx. The mean of x new =42 and the variance of x new = 36. Suppose b is a positive number. What does a equal?...
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