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Viewing:

General Statistics: Ch 2 Test

front 1

Construct the cumulative frequency distribution that corresponds to the given frequency distribution.

back 1

5 (+5)

7 (5 + 2)

12 (5 + 2 + 5)

17 (5 + 2 + 5+ 5)

30 (5 + 2 + 5 + 5 + 13)

front 2

Construct the cumulative frequency distribution that corresponds to the given frequency distribution.

back 2

19 (+19)

36 (19 + 17)

51 (19 + 17 + 15)

71 (19 + 17 + 15 + 20)

80 (19 + 17 + 15 + 20 + 9)

front 3

Provide an appropriate response.

The frequency distribution below summarizes employee years of service for Alpha Corporation.

Find the class boundaries for class 26-30.

back 3

25.5, 30.5

front 4

Provide an appropriate response.

The histogram below represents the number of television sets per household for a sample of U.S.households.

How many households are included in the histogram?

back 4

100

sum total of frequencies

= (20 + 50 + 15 + 10 + 5)

front 5

Provide an appropriate response.

The frequency distribution below summarizes employee years of service for Alpha Corporation.

Find the class midpoint for class 1-5.

back 5

3.0

midpoint = (1 + 5) ÷ 2 = 3.0

front 6

Provide an appropriate response.

Sturges' guideline suggests that when constructing a frequency distribution, the ideal number of classes can be approximated by 1 + (log n)/(log 2), where n is the number of data values.

Use this guideline to find the ideal number of classes when the number of data values is 146.

back 6

8

1 + ( log(146) ) ÷ ( log(2) )

= 8.2

front 7

Use the given paired data to construct a scatterplot.

back 7

front 8

Solve the problem.

At the National Criminologists Association's annual convention, participants filled out a questionnaire asking what they thought was the most important cause for criminal behavior. The tally was as follows.

Construct a Pareto chart to display these findings.

back 8

front 9

Construct the dotplot for the given data.

A store manager counts the number of customers who make a purchase in his store each day. The data are as follows.

15 16 13 19 12 15 15 16 13 12

back 9

front 10

Find the original data from the stemplot.

back 10

7.11, 7.18, 7.28, 7.29, 7.31, 7.39, 7.39