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Exam4F07 - Exam 4 Fall 2007 1 U number Psych Stats Fall...

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Exam 4 Fall 2007 U number_________________________ Psych Stats Fall 2007 Brannick Exam 4 Instructions: Write your name, U number, and section 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 keep the questions; turn in the scantron. Handy formulas: N X X = ; X s X X z - = A=(z*100)+500 T=(z*10)+50 z=(A-500)/100 z=(T-50)/10 A=10T 2 1 2 1 2 2 X X X X S S S + = - ; N s s X X 2 = 1 ) ( 2 2 - - = N X X s X ; 1 ) ( 2 - - = N X X s 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 = - μ D S D t μ - = 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 = 1
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Exam 4 Fall 2007 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 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
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Exam 4 Fall 2007 Chapter 1 Introduction to Statistics and Research 1. According to statistical jargon, what is a sample? a. A specific clinical group, such as depressed females. b. All of the potential participants in a study c. Entire group of interest d. Subset of the group of interest 2. The independent variable is best defined as 3. The difference between statistics and parameters is that 4. The design of a study is its ________________ Chapter 2 Creating and Using Frequency Distributions Consider the following scores: 1, 2, 3, 3, 4, 5 5. For the above set of scores, what is N? a. 1 b. 4 c. 5 d. 6 6. For the above set of scores, what is the percentage (relative frequency) of 3s? 3
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Exam 4 Fall 2007
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