exam1Sp10 - Exam 1 Spring 2010 1 U number_ Psych Stats...

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Exam 1 Spring 2010 U number_________________________ Psych Stats Spring 2010 Brannick Exam 1 Instructions: Write your name, U number, and section number on the scantron; bubble them in. Answer any 40 of 45 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 45, 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 (standard) 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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Exam 1 Spring 2010 Chapter 1 Introduction to Statistics and Research 1.The difference between a statistic and a parameter is that the parameter refers to the _________. a. calculation b. characteristic c. population d. sample 2. The symbol μ (mu) refers to the a. Population mean b. Sample mean c. Standard deviation d. Variance 3. The purpose of most research is to study the _______ between variables. a. Causation b. Conflation c. Inferences d. Relationships 4. The set of data collection procedures that we use to conduct a study is called the study’s a. analysis b. arrangement c. design d. document 5.Suppose we want to know whether Zicam lozenges really help people recover from the common cold. We randomly assign cold sufferers to get one of two kinds of cough drop, either Zicam or Brach’s peppermint candy. A month later, we ask everybody how many days the cold lasted to see if there is a difference between groups. What is the independent variable in this study? a. Disease (cold) b. Medicine (type of lozenge) c. Participant beliefs about the value of medicine d. Time to recover 2
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Exam 1 Spring 2010 6.Statistical procedures that use a sample to base conclusion about the scores and relationships that would be found in a population are called _______. a.
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exam1Sp10 - Exam 1 Spring 2010 1 U number_ Psych Stats...

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