ap08_stat_form_b_frq

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Unformatted text preview: ege Board. PSAT/NMSQT is a registered trademark of the College Board and National Merit Scholarship Corporation. Permission to use copyrighted College Board materials may be requested online at: www.collegeboard.com/inquiry/cbpermit.html. Visit the College Board on the Web: www.collegeboard.com. AP Central is the official online home for the AP Program: apcentral.collegeboard.com. 2008 AP® STATISTICS FREE-RESPONSE QUESTIONS (Form B) Formulas begin on page 3. Questions begin on page 6. Tables begin on page 13. -2- 2008 AP® STATISTICS FREE-RESPONSE QUESTIONS (Form B) Formulas (I) Descriptive Statistics xi n x 1 sx xi x yi xi y b1 r x xi 1 2 1 x sx yi y sy sy sx yi sb y b1 x 1 n n2 1 b1 x b1 r 2 n2 1 s 2 2 n1 1 b0 b0 x n1 1 s2 1 sp ˆ y xi 1 n ˆ yi n 2 xi x 2 2 -3- 2008 AP® STATISTICS FREE-RESPONSE QUESTIONS (Form B) (II) Probability P( A B) P ( A) P( A B) P ( A B) P ( B) P ( A B) μx E( X ) P ( B) xi pi s2 x Var( X ) xi μx 2 pi If X has a binomial distribution with parameters n and p , then: P( X μx sx μp ˆ nk p (1 k k) p )n k np np(1 p) p p(1 sp ˆ p) n If x is the mean of a random sample of size n from an infinite population with mean μ and standard deviation s , then: μx sx μ s n -4- 2008 AP® STATISTICS FREE-RESPONSE QUESTIONS (Form B) (III) Inferential Statistics Standardized test statistic: statistic parameter standard deviation of statistic Confidence interval: statistic critical value standard deviation of statistic Single-Sample Standard Deviation of...
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