3. a Symmetrical Distribution Has No Variation. (Points : 1) True False

1. A distribution with an equal mean, median, and mode is said to be: (Points : 1) Bimodal Symetrical Unimodal Both Symtrical and Unimodal

2. The strength of a correlation is indicated by: (Points : 1) the sign (+ or - ). its size. both 1 and 2 none of the above

3. A symmetrical distribution has no variation. (Points : 1) True False

4. If an interval variable has a skewed distribution, the median is better measure of central tendency than the mean. (Points : 1) True False

5. The median is the appropriate measure of central tendency to use with a skewed distribution. (Points : 1) True False

6. If variable X increases as variable Y decreases, the correlation is said to be: (Points : 1) positive negative weak zero

7. If variable X increases as variable Y remains constant, the correlation is said to be: (Points : 1) positive negative strong zero

8. The standard deviation should only be used for variables measured at which level? (Points : 1) nominal level Interval level ordinal level all of the above

9. Which type of distribution of final grades would be most desirable to students? (Points : 1) bimodal unimodal negatively skewed positively skewed

10. Which measure of central tendency is most appropriate for a skewed distribution? (Points : 1) the mode the mean the median 1 and 2

11. Deviation refers to: (Points : 1) the number of scores not equal to the mean. the variance between scores. the distance of any score from the mean. none of the above.

12. Which measure(s) of central tendency cannot be applied to nominal data? (Points : 1) the mean the median the mode Both 1 and 2

13. An indication of skew can be found by comparing the mode, median and mean. (Points : 1) True False

14. A group of friends really love to go bowling together. Here are a set of final scores from a recent bowling trip: 147, 160, 80, 110, 121, 164, 62, 90, 76, 83, 110 What is the mode? (Points : 1) 110 2 121 None

15. A group of friends really love to go bowling together. Here are a set of final scores from a recent bowling trip: 147, 160, 80, 110, 121, 164, 62, 90, 76, 83, 110 What is the median? (Points : 1) 90 110 164 6

16. Given the following scores: 10, 12, 19, 5, 6, 8, 1, 13, 4, 7; what is the mean? (Points : 1) 8.5 6.82 7.72 9

17. The range is useful for: (Points : 1) estimating the standard deviation. advanced statistical procedures. computing the median. all of the above

18. The higher the standard deviation the greater the variation. (Points : 1) True False

19. A Bar Graph, in contrast to a Histogram uses what type of data? (Points : 1) Discrete Continuous Interval None of the above

20. Variability refers to: (Points : 1) the number of scores in a sample. the spread of the sample scores. the precision of the sample mean. none of the above