Exam4F07 - Exam 4 Fall 2007 U...

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Unformatted text preview: 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 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 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 a. The cause or manipulated variable b. The effect our outcome of a study c. The number of participants in a study d. The numerator in the F test 3. The difference between statistics and parameters is that a. Statistics apply to populations, parameters apply to samples b. Statistics apply to samples, parameters apply to populations c. Statistics can only be estimated, but parameters are generally known d. Statistics have a single value, parameters have multiple values 4.The design of a study is its ________________ a. Choice of population b. Choice of sample c. Method of data analysis d. Procedure for data collection 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?...
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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.

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Exam4F07 - Exam 4 Fall 2007 U...

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