Question Details

11. The median is the value below which and above which approximately 50 percent of the measurements

lie.

True False

12. An independent variable is a predictor variable that can be used to describe, predict, or control a

dependent variable.

True False

13. The relative frequency is the frequency of a class divided by the total number of measurements.

True False

14. The box-and-whiskers display is a graphical portrayal of data sets that depict both the central tendency

and variability of the data.

True False

15. When establishing the classes for a frequency table it is generally agreed that the more classes you use the

better your frequency table will be.

True False

16. If there are 7 classes in a frequency distribution, then the fourth class will always contain the median.

True False

17. The sample cumulative distribution function is non-decreasing.

True False

18. Range is a better measure of variation than standard deviation.

True False

19. A normal population has 99.73 percent of the population measurements within _____ standard deviations

of the mean.

A. One

B. Two

C. Three

D. Four

E. Five

20. A numeric characteristic of a sample is a(n) ____________.

A. Mean

B. Variance

C. Statistic

D. Parameter

E. Scale