The mean of the data used in Exercise 5.1 is 46.57. Suppose that we had an additional subject who had a score of 46.57. Recalculate the variance for these data. (You can build on the intermediate steps used in Exercise 5.1.) What effect does this score have on the answers to Exercise 5.1?
Answer to relevant QuestionsInstead of adding a score equal to the mean (as in Exercise 5.15), add a score of 40 to the data used in Exercise 5.1. How does this score affect the answers to Exercise 5.1? In Section 5.10, statistics were computed from the reaction time data in Chapter 3. What would you conclude from these data about the relationship between accuracy and reaction time? In Exercise 5.2, what percentage of the scores fall within two standard deviations from the mean? Several years ago a friend of mine in the Communication Sciences department produced a diagnostic test of language problems that is still widely used. A score on her scale is obtained simply by counting the number of ...Use any Internet search engine to find a program that will generate normally distributed data and plot them.
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