Question

1,3,4

Exercises For Conceptual Understandin 1 In what sense is the mean an appropriate index of central tendency? 2. In what sense is the variance an appropriate in- dex of variability? 3. Indicate which index of central tendency would be preferred for each of the following distribu- tions, and explain why. a. household incomes in the United States b. heights of seniors in a public high school c. IQ scores of third-graders in a public school 4. Draw the curves for distributions in which a. the mean, median, and mode are identical. b. the mean and median are identical but the mode is different.

Answer 1