exam4Sp08 - Exam 4 Spring 2008 1 Name_ Psych Stats Spring...

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Exam 4 Spring 2008 Name_________________________ Psych Stats Spring 2008 Brannick Exam 4 Instructions: Write your name and U number on the scantron. Answer any 50 of 55 questions on the exam by bubbling in the best of the four alternatives given. For those questions you wish to omit, bubble in “e.” If you answer all 55, I will choose the last 5 for you, so it is in your interest to pick 5 and bubble in “e”. You can take the printed exam with you. Handy formulas: SD X X z - = N X X = 2 1 2 1 2 2 X X X X S S S + = - 1 ) ( 2 2 - - = N X X s X 1 ) ( 2 - - = N X X s X X obt s X t μ - = t X X S X X = - - 1 2 1 2 D S D t - = X z X CI σ 05 . % 95 ± = X s t X CI 05 . % 95 ± = N s s X X 2 = ; 1 ) ( 2 2 - - = N X X s X N X X = pairs D pairs D D N S N SD S 2 = = t X X S X X = - - 1 2 1 2 t X S X = - D S D t - = N z z r Y X = ; X X S X X z - = X Y S S r b = ; X b Y a - = ; bX a Y + = ˆ - = 2 ) ( G i tot X X SS SS tot =SS b +SS w 2 ) ( A i w X X SS - = 2 ) ( G A g b X X N SS - = MS =SS/df; Df tot = df w +df b; df t = N-1; df w = N-k; df b = k-1 A W N MS q HSD α = W B obt MS MS F = Critical values of t , alpha = .05, two-tails Df t df t 1 12.706 6 2.447 2 4.303 7 2.365 3 3.182 8 2.306 4 2.776 9 2.262 5 2.571 10 2.228 50 2.01 100 1.98 1

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Exam 4 Spring 2008 Critical values of F Numerator df: df B df W 1 2 3 4 5 5 5% 1% 6.61 16.3 5.79 13.3 5.41 12.1 5.19 11.4 5.05 11.0 10 5% 1% 4.96 10.0 4.10 7.56 3.71 6.55 3.48 5.99 3.33 5.64 12 5% 1% 4.75 9.33 3.89 6.94 3.49 5.95 3.26 5.41 3.11 5.06 14 5% 1% 4.60 8.86 3.74 6.51 3.34 5.56 3.11 5.04 2.96 4.70 2
Chapter 1 Introduction to Statistics and Research 1.Parameter is to population as statistic is to _________. a. collection b. participants c. people d. sample 2.A clinical psychologist is interested in the effects of a new anti-anxiety drug on patients with phobias. She finds 30 people with spider phobias and randomly assigns them to one of two groups. In one group, they get the new drug. In the other group, they get a placebo. Later, each patient is marched into a lab containing a large, hairy spider in a terrarium. Patients are placed on the far side of the room and asked to approach the spider and pick it up. The psychologist measures how close the patients actually get to the spider. In this study, the independent variable is ________. a. The distance between person and spider b. The drug c. The patients d. The spider 3.In the spider study above, the dependent variable is __________. a. The distance between person and spider b. The drug c. The patients d. The spider 4. What sort of scale of measurement is the distance between person and spider if we measure in feet and inches with a tape measure? a.

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This note was uploaded on 05/21/2011 for the course PSY 3204 taught by Professor Brannick during the Spring '10 term at University of South Florida - Tampa.

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exam4Sp08 - Exam 4 Spring 2008 1 Name_ Psych Stats Spring...

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