Conscientiousness is a tendency to show self-discipline, act dutifully, andaim for achievement. The trait shows a preference for planned rather thanspontaneous behavior. A random sample of 650 students is asked to fill outthe Hogan Personality Inventory (HPI) to measure their level ofconscientiousness. The 350 graduate students had a mean score of 153with a standard deviation of 21. The 300 undergraduate students scoredan average of 148 with a standard deviation of 16. We are interested indetermining whether graduate students score higher, on average, on theHPI than undergraduate students. What are the appropriate null andalternative hypotheses?$4RO Ho: HG- HUG # 0 and Ha: HG- HUG = 0O Ho: HG- HUG = 0 and Ha: HG- HUGOO Ho: HG HUG = 0 and H₂: HG- HUG #0O Ho: HG- HUG = 0 and H₂: HG- HUG > Otv%Q Search or enter address5eTA6MacBook ProYA&7U*8↑-(9O)0

Given that Sample sizes n1=350 , n2=300 Sample means X̄1=153 , X̄2=148 s1…

Answered: Conscientiousness is a tendency to show…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A graduate student is interested in how viewing different types of scenes affects working memory. For his study, he selects a random sample of 36 adults. The subjects complete a series of working memory tests before and after walking in an urban setting. Before the walk, the mean score on the test of working memory was 9.1. After the walk, the mean score was 1.4 higher. The graduate student has no presupposed assumptions about how viewing different types of scenes affects working memory, so he formulates the null and alternative hypotheses as: H00 : μDD = 0 H11 : μDD ≠ 0 Assume that the data satisfy all of the required assumptions for a repeated-measures t test. The graduate student calculates the following statistics for his hypothesis test: Mean difference (MDD) 1.4 Estimated population standard deviation of the differences (s) 1.6 Estimated standard error of the mean differences (sMDMD) 0.2667 Degrees of freedom (df) 35 The t statistic 5.25 The critical values of t…
A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?
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The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. The survey yields several scores, one of which measures student attitudes toward studying. The mean student attitude score for college students is about 30, and standard deviation is about 12. A researcher in the Philippines is concerned about the declining performance of college graduates on professional licensure and board exams. She suspects that poor attitudes of students are partly responsible for the decline and that the mean for college seniors who plan to take professional licensure or board exams is less than 30. She gives the SSHA to an SRS of 144 college seniors in the Philippines who plan to take professional licensure or board exams. Suppose we know that the student attitude scores in the population of such students are Normally distributed with standard deviation σ = 12. (a) We seek evidence against the claim that μ = 30. What is the…
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