Problem Set 2_spring11_solutions

Problem Set 2_spring11_solutions - Problem Set 2: Chapters...

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1 Problem Set 2: Chapters 5-8 SOLUTIONS PSY207 B : Spring 2011 Due at the beginning of class on Monday, 3/7 – NO EXCEPTIONS. You must hand in your work on this form. Each question is worth ½ point. Name: _________________________________ Person number: _________________________________ Note: It is possible that you may not be able to compute some answers because of insufficient information. If so, simply indicate “insufficient information” in the space provided for the answer. 1. For a population with μ = 1000 and ơ = 50, what is the z-score corresponding to X = 810? __________________ what is the X value corresponding to z = 0.50? __________________ z = (X μ) / σ z = (810 1000) / 50 = 3.8 X = μ + (z) ( σ ) X = 1000 + (0.50) (50) = 1025 2. A population of scores has μ = 500. In this population, an X value of 440 corresponds to z = - 2.50. What is the population standard deviation? __________________ z = (X μ) / σ σ = (X μ) / z = (440 -500) / 2.5 = 24
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Problem Set 2_spring11_solutions - Problem Set 2: Chapters...

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