exam1F07

exam1F07 - Exam 1 Fall 2007 1 U number_ Psych Stats Fall...

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Exam 1 Fall 2007 U number_________________________ Psych Stats Fall 2007 Brannick Exam 1 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: 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.According to statistical jargon, what is a population? a. A specific clinical group, such as depressed females. b. All of the participants in a study c. Entire group of interest d. Subset of a group of interest 2.What are participants or subjects? a. Individuals in the sample b. Members of a specific clinical group, such as depressed females c. Research assistants d. Research confederates 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. Procedures for organizing and summarizing sample data are called _______. a. Descriptive statistics b. Inferential statistics c. Means d. Variables 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 a new drug prevents the common cold. We randomly assign volunteers to either get the anti-cold pill or a placebo (chalk pill). Two months later, we record the number of days each person has suffered cold symptoms to see if the anti-cold pill results in fewer symptoms. What is the independent variable in this study? a.
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exam1F07 - Exam 1 Fall 2007 1 U number_ Psych Stats Fall...

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