exam1Sp08

exam1Sp08 - Exam 1 Spring 2008 1 U number_ Psych Stats...

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Exam 1 Spring 2008 U number_________________________ Psych Stats Spring 2008 Brannick Exam 1 Instructions: Write your name, U number, and section number on the scantron; bubble them in. 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 (test booklet); turn in the scantron. Handy formulas: SD X X z - = A=(z*100)+500 T=(z*10)+50 z=(A-500)/100 z=(T-50)/10 A=10T N X X = N X = μ N X - = 2 ) ( σ N X - = 2 2 ) ( N X X S X - = 2 2 ) ( ; N X X S X - = 2 ) ( 1 ) ( 2 2 - - = N X X s X ; 1 ) ( 2 - - = N X X s X Tabled values of z, the unit normal. Z Between mean and z Beyond z Z Between mean and z Beyond z 0.00 0.0 50.00 0.90 31.5 18.41 0.10 3.98 46.02 1.00 34.13 15.87 0.20 7.93 42.07 1.10 36.43 13.57 0.30 11.79 38.21 1.20 38.49 11.51 0.40 15.54 34.46 1.30 40.32 09.68 0.50 19.15 30.85 1.40 41.92 08.08 0.60 22.57 27.43 1.50 43.32 06.68 0.70 25.80 24.20 1.60 44.52 05.48 0.80 28.81 21.19 1.70 45.54 04.46 1
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Chapter 1 Introduction to Statistics and Research 1.A population concerns ____; the sample concerns _______. a. A Subset of people, all the people b. All the people, a subset of people. c. Experimenters, participants d. Participants, experimenters 2.We use a statistic to summarize a variable for what group? a. informational b. population c. research confederate d. sample 3. A variable is best defined as a. A numerical summary of a population b. A numerical summary of a sample c. Anything that can produce two or more scores d. Anything that produces a single score 4. The purpose of most research is to study the _______ between variables. a. Causation b. Conflation c. Inferences d. Relationships 5. 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 6.Suppose we want to know whether Tropicana tastes better than Minute Maid orange juice. We grab 40 people and have them taste one orange juice or the other in a blind tasting (20 people per group) and have them rate the juice on a scale from 1 to 10 where 1 is bad and 10 is good. What is the independent variable in this study? a.
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exam1Sp08 - Exam 1 Spring 2008 1 U number_ Psych Stats...

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