Answered: How would you react to doing much worse…

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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How would you react to doing much worse on anexam than you expected? There is some evidence tosuggest that most individuals believe that they cancope with this kind of problem better than their fellowstudents (Igou, 2008). In the study, participants read a scenario of a negative event and were asked to usea 10-point scale to rate how it would affect theirimmediate well-being (-5 strongly worsen to +5strongly improve). Then they were asked to imaginethe event from the perspective of an ordinary fellowstudent and rate how it would affect that person. Thedifference between the two ratings was recorded.Suppose that a sample of n=25 participants produceda mean difference of MD= 1.28 points (self ratedhigher) with a standard deviation of s=1.50 for thedifference scores.

Is this result sufficient to conclude that there is a significant difference in the ratings for self versus others? Use a two-tailed test with a= .05
Compute r2 and estimate Cohen’s d to measure the size of the treatment effect.
Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.

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