SPEA K300 CHAPTER 2 REVIEW EXERCISES
DESCRIBING DATA: FREQUENCY DISTRIBUTIONS AND GRAPHS
Name ___________________________________ Group __________ Score _________
Part I Select the correct answer and write the appropriate letter in the space provided
_____ 1. A grouping of data into classes giving the number of observations in each class is called a(an)
abar chart.
b. frequency distribution.
c. pie chart.
d. cumulative frequency distribution.
______ 2. The distance between consecutive lower class limits is called the
a. class interval.
b. frequency distribution.
c. class midpoint.
d. class frequency.
______ 3. The class midpoint is
a. equal to the number of observations.
b. found by adding the upper and lower class limit and dividing by 2.
c. equal to the class interval.
d. all of the above.
______ 4. The number of observations in a particular class is called the
a. class interval.
b. class frequency.
c. frequency distribution.
d. none of the above.
______ 5. A bar chart is used most often when
a. you want to show frequencies as compared to total observations.
b. you want to show frequencies by class intervals.
c. you want to display frequencies by category.
d. you want to organize data along certain time interval.
______ 6. In a relative frequency distribution
a. the class frequencies are divided by 100.
b. the data are related to each other rather than mutually exclusive.
c. the class frequency is divided by the total number of observations.
d. the frequencies are added together to give a relative set of numbers.
______ 7. For a line chart involving time in years and dollar values, the horizontal or X-axis would be
used to represent
a. the dollar variable. b. the time variable.
c. the class interval. d. the class frequency.
Chapter 2 Describing Data: Frequency Distributions
and Graphic Presentation
