A group of 15 rats running a straight-alley maze required the following number of trials to perform to a predetermined criterion. The frequency distribution follows:
Calculate the mean and median number of trials to criterion for this group. (You can either write out the 15 numbers or you can think about how you could incorporate the frequencies directly into the formula for the mean.)
Answer to relevant QuestionsGiven the following set of data, demonstrate that subtracting a constant (e.g., 5) from every score reduces all measures of central tendency by that amount. Create a boxplot for the data in Exercise 5.2. In Exercise 5.2. The following graph came from the JMP statistical package applied to the data in Table 5.3 on length of hospitalization. Notice the boxplot on the top of the figure. How does that boxplot compare with the ones we have been ...In Exercise 5.1, 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 ...
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