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