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Exam 2: Descriptive Statistics: Tabular and Graphical Presentations

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Question 41

Multiple Choice

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For stem-and-leaf displays where the leaf unit is not stated, the leaf unit is assumed to equal

A) 0
B) .1
C) 1
D) 10

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Question 42

Multiple Choice

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Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should

A) investigate whether any hidden variables could affect the conclusions
B) construct a scatter diagram and find the trendline
C) develop a relative frequency distribution
D) construct an ogive for each of the variables

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Question 43

Multiple Choice

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Excel's __________ can be used to construct a frequency distribution for categorical data.

Exhibit 2-3 The number of sick days taken (per month) by 200 factory workers is summarized below. -Refer to Exhibit 2-3. The midpoint of the first class is

Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. -Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less

Excel's Chart Tools can be used to construct a

A graphical device for presenting categorical data summaries based on subdivision of a circle into sectors that correspond to the relative frequency for each class is a

Construct a stem-and-leaf display for the following data. Specify the leaf unit for the display.

A graphical presentation of the relationship between two quantitative variables is

Methods that use simple arithmetic and easy-to-draw graphs to summarize data quickly are called

Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. -Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20  29

For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exist between x and y.

The sum of frequencies for all classes will always equal

It is time for Roger Hall, manager of new car sales at the Maxwell Ford dealership, to submit his order for new Mustang coupes. These cars will be parked in the lot, available for immediate sale to buyers who are not special-ordering a car. Roger must decide how many Mustangs of each color he should order. The new color options are very similar to the past year's options. Roger believes the colors chosen by customers who special-order their cars best reflect most customers' true color preferences. He has taken a random sample of 40 special orders for Mustang coupes placed in the past year. The color preferences found in the sample are listed below. a. Prepare a frequency distribution, relative frequency distribution, and percent frequency distribution for the data set. b. Construct a bar chart showing the frequency distribution of the car colors. c. Construct a pie chart showing the percent frequency distribution of the car colors.

Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. -Refer to Exhibit 2-1. The cumulative frequency for the class of 20  29

Exhibit 2-2 Information on the type of industry is provided for a sample of 50 Fortune 500 companies. -Refer to Exhibit 2-2. The percent frequency of industries that are classified as electronics is

The difference between the lower class limits of adjacent classes provides the

Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. -Refer to Exhibit 2-1. The number of students working 19 hours or less

In a stem-and-leaf display,

You are given the following data on the earnings per share for ten companies. Construct a stem-and-leaf display. Specify the leaf unit for the display.