A social psychologist recently developed a childhood-memories test that is intended tomeasure how people recall pleasant and unpleasant experiences from childhood. Scoreson the test range from 1 (very unpleasant) to 100 (very pleasant). The psychologiststandardized the test with a large group of college students (ages 18-25), and the meanscore was p=60. The test was then given to a sample of n=25 individuals who were allbetween the ages of 40 and 45. The average score for this sample was 64.3 with SS (sumof squares)=600. Note: S?=SS÷df (variance is equal to sum of squares divided by thedegrees of freedom). What is your conclusion if you were to test the hypothesis using one-tailed test at a=0.05?O a. Reject the null hypothesisO b. Fail to reject the null hypothesisO c. Accept the null hypothesisO d. None of the above

Hypothesis, H0: The mean score is u= 60 H1: The mean score is not 60. u=! 60 Given that, Mean, x̄=…

Answered: A social psychologist recently…

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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Good credit: The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to determine whether someone is a good credit risk. Scores range from 300 to 850, with a score of 720 or more indicating that a person is a very good credit risk. An economist wants to determine whether the mean FICO score is more than the cutoff of 720. She finds that a random sample of 40 people had a mean FICO score of 760 with a standerd deviation of 95, Can the economist conclude that the mean FICO score is greater than 720? Use the a=0.01 level of significance and the P-value method with the T1-B4 Plus calculator. Part 1 of 4 State the appropriate null and altemate hypotheses. H D-0 H: This hypothesis test is a (Choose one) test. left-tailed right-tailed two-tailed
A social psychologist recently developed a childhood-memories test that is intended to measure how people recall pleasant and unpleasant experiences from childhood. Scores on the test range from 1 (very unpleasant) to 100 (very pleasant). The psychologist standardized the test with a large group of college students (ages 18-25), and the mean score was p=60. The test was then given to a sample of n=25 individuals who were all between the ages of 40 and 45. The average score for this sample was 64.3 with SS (sum of squares)=600. Note: S?=SS÷df (variance is equal to sum of squares divided by the degrees of freedom). If you were to test the hypothesis using one-tailed test at a=0.05, what is the difference between group of scores using Cohen's d? O a. medium O b. small O c. large O d. none at all
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Imagine a researcher wants to determine whether or not a given drug has any effect on the scores of human subjects performing a task of ESP (Extrasensory perception) sensitivity. He randomly assigns his subjects to one of two groups. Nine hundred subjects in group 1 (the experimental group) receive an oral administration of the drug prior to testing. In contrast, 1000 subjects in group 2 (control group) receive a placebo. For the drug group, the mean score on the ESP test was 9.78, S.D. = 4.05, n = 900 or the placebo group, the mean = 15.10, S.D. = 4.28, n= 1000. Test if there is any effect.
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