Compare the answers to Exercises 5.1 and 5.2. Is the standard deviation for performance when people do not read the passage different from the standard deviation when people do read the passage?
Answer to relevant QuestionsIn Exercise 5.1, what percentage of the scores fall within two standard deviations from the mean? Use the answers to Exercises 5.6 and 5.7 to modify the answer to Exercise 5.8 to have a mean of 0 and a standard deviation of 1.00. In Exercise 6.14, what score would be equal to or greater than 75% of the reaction times if this distribution were normal. What score actually has 75% of the observations below it? Most of you have had experience with exam scores that were rescaled so that the instructor could “grade on a curve.” Assume that a large Psychology 1 class has just taken an exam with 300 four-choice multiple-choice ...In a study of the effectiveness of “please don’t litter” requests on supermarket fliers, Geller, Witmer, and Orebaugh (1976) found that the probability that a flier carrying a “do not litter” message would end up ...
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