MGMT 1050 Lecture Notes - Contingency Table, Scatter Plot, Pie Chart

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27 Jan 2013
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CHAPTER 2
GRAPHICAL AND TABULAR
DESCRIPTIVE TECHNIQUES
SECTIONS 1
MULTIPLE CHOICE QUESTIONS
In the following multiple-choice questions, please circle the correct answer.
1. Which of the following statements is false?
a. All calculations are permitted on interval data
b. All calculations are permitted on nominal data
c. The most important aspect of ordinal data is the order of the data values
d. The only permissible calculations on ordinal data are ones involving a ranking
process
ANSWER: b
2. The average number of units earned per semester by college students is suspected to be
rising. A researcher at Boston College wishes to estimate the number of units earned by
students during the spring semester of 2004 at Boston. To do so, he randomly selects 250
student transcripts and records the number of units each student earned in the spring term
of 2004. The variable of interest to the researcher is the
a. number of students enrolled at Boston College during the spring term of 2004
b. average indebtedness of Boston College students enrolled in the spring
c. age of Boston College students enrolled in the spring
d. number of units earned by Boston College students during the spring term of
2004
ANSWER: d
13
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14 Chapter Two
3. The classification of student major (accounting, economics, management, marketing,
other) is an example of
a. a categorical random variable.
b. a discrete random variable
c. a continuous random variable
d. a parameter.
ANSWER: a
4. A study is under way in national forest to determine the adult height of pine trees.
Specifically, the study is attempting to determine what factors aid a tree in reaching
heights greater than 50 feet tall. It is estimated that the forest contains 32,000 adult pines.
The study involves collecting heights from 500 randomly selected adult pine trees and
analyzing the results. The variable of interest in the study is the
a. age of a pine tree in the national forest.
b. height of a pine tree in the national forest.
c. number of pine trees in the national forest.
d. species of trees in the national forest.
ANSWER: b
5. The classification of student class designation (freshman, sophomore, junior, senior) is an
example of
a. a categorical random variable.
b. a discrete random variable.
c. a continuous random variable.
d. a parameter.
ANSWER: a
6. Most analysts focus on the cost of tuition as the way to measure the cost of a college
education. But incidentals, such as textbook costs, are rarely considered. A researcher at
Ferris State University wishes to estimate the textbook costs of first-year students at
Ferris. To do so, he monitored the textbook cost of 200 first-year students and found that
their average textbook cost was $275 per semester. The variable of interest to the
researcher is the
a. textbook cost of first-year Ferris State University students.
b. year in school of Ferris State University students.
c. age of Ferris State University students.
d. cost of incidental expenses of Ferris State University students.
ANSWER: a
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Graphical and Tabular Descriptive Techniques
15
7. The manager of the customer service division of a major consumer electronics company is
interested in determining whether the customers who have purchased a videocassette
recorder made by the company over the past 12 months are satisfied with their products.
The possible responses to the question “Are you happy, indifferent, or unhappy with the
performance per dollar spent on the videocassette recorder?” are values from a
a. discrete numerical random variable.
b. continuous numerical random variable
c. categorical random variable.
d. parameter.
ANSWER: c
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