Chapter 2: QUIZ

1. The relative frequency of a class is computed by
A. dividing the midpoint of the class by the sample size
B. dividing the frequency of the class by the midpoint
C. dividing the sample size by the frequency of the class
D. dividing the frequency of the class by the sample size
E. none of the above

2. A frequency distribution is
A. a tabular summary of a set of data showing the relative frequency
B. a graphical form of representing data
C. a tabular summary of a set of data showing the frequency of items in each of several non-overlapping classes
D. a graphical device for presenting qualitative data
E. none of the above

Use the above data for the next 3 questions

3. The relative frequency of students working 9 hours or less
A. is 20
B. is 100
C. is .95
D. is .05
E. cannot be determined from the information given

4. The percent of students working 19 hours or less is
A. 20%
B. 25%
C. 75%
D. 80%
E. none of the above

5. The cumulative percent frequency for the class of 30-39 is
A. 100%
B. 75%
C. 50%
D. 25%

6. In constructing a frequency distribution, as the number of classes are decreased, the class width
A. decreases
B. remains unchanged
C. increases
D. can increase or decrease depending on the data values
E. none of the above

7. A tabular method which can be used to summarize the data on two variables simultaneously is called
A. simultaneous equations
B. cross-tabulation
C. a histogram
D. an ogive
E. none of the above

8. A graphical presentation of the relationship between two variables is
A. an ogive
B. a histogram
C. either an ogive or a histogram, depending on the type of data
D. a scatter diagram
E. none of the above

9. The most common graphical presentation of quantitative data is a
A. histogram
B. bar graph
C. relative frequency
D. pie chart
E. none of the above

10. Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management and 30% in Accounting. The graphical device(s) which can be used to present these data is (are)
A. a line graph
B. only a bar graph
C. only a pie chart
D. both a bar graph and a pie chart
E. none of the above