Macroeconomics
Chapter 1 & 2 Name: ____________________________ Date: ________________
SCENARIO 1-1
The manager of the customer service division of a major consumer electronics company is interested
in determining whether the customers who have purchased a Blu-ray player made by the company
over the past 12 months are satisfied with their products.
1. Referring to Scenario 1-1, the possible responses to the question "How many Blu-ray players
made by other manufacturers have you used? “results in 1. ________
a) a nominal scale variable.
b) an ordinal scale variable.
c) an interval scale variable.
d) a ratio scale variable.
2. True or False: The answer to the question “How many hours on average do you spend watching
TV every week?” is an example of a ratio scaled variable. 2. ________
3. The Dean of Students conducted a survey on campus. Grade point average (GPA) is an example
of a _______ numerical variable. 3. ________
4. The level of satisfaction (“Very unsatisfied”, “Fairly unsatisfied”, “Fairly satisfied”, and “Very
satisfied”) in a class is an example of an ordinal scaled variable. 4. ________
5. Referring to Scenario 1-2, the possible responses to the question "How many more months do
you think the U.S. economy will require to get out of a recession?" are values from a 5. ________
a) discrete numerical variable.
b) continuous numerical variable.
c) categorical variable.
d) table of random numbers.
6. A study is under way in Yosemite National Forest to determine the adult height of American
pine trees. Specifically, the study is attempting to determine what factors aid a tree in reaching
heights greater than 60 feet tall. It is estimated that the forest contains 25,000 adult American
pines. The study involves collecting heights from 250 randomly selected adult American pine 6. ________
trees and analyzing the results. Identify the population from which the study was sampled.
a) The 250 randomly selected adult American pine trees.
b) The 25,000 adult American pine trees in the forest.
c) All the adult American pine trees taller than 60 feet.
d) All American pine trees, of any age, in the forest.
7. The Human Resources Director of a large corporation wishes to develop an employee benefits
package and decides to select 500 employees from a list of all (N = 40,000) workers in order to
study their preferences for the various components of a potential package. The Director will use
the data from the sample to compute _______. 7. ________
8. Which of the following is NOT a reason for selecting a sample? 8. ________
a) A sample is less time consuming than a census.
b) A sample is less costly to administer than a census.
c) A sample is usually not a good representation of the target population.
d) A sample is less cumbersome and more practical to administer.
9. Which of the following types of samples can you use if you want to make valid statistical
inferences from a sample to a population? 9. ________
a) A judgment sample
b) A quota sample
c) A convenience sample
d) A probability sample
10. True or False: Using different frames to generate data can lead to totally different conclusions.
10. ________
11. True or False: In business statistics class students sit randomly without preferences. A sample
is selected by including everybody who sits in the first row. This is an example of a cluster 11. ________
sample.
12. Referring to Scenario 1-3, if a customer survey questionnaire is included in all the Blu-ray
players made and sold by the company over the past 12 months, this method of collecting data 12. ________
will most like suffer from
a) nonresponse error.
b) measurement error.
c) coverage error.
d) nonprobability sampling.
13. Referring to Scenario 2-5, if 1,000 calls were randomly sampled, how many calls lasted under 10
minutes? 13. ________
a. 220
b. 370
c. 410
d. 590
14. You have collected information on the market share of 5 different search engines used by U.S.
Internet users in a quarter. Which of the following is the best for presenting the information? 14. ________
a) A pie chart.
b) A histogram
c) A stem-and-leaf display.
d) A contingency table.
15. Referring to Scenario 2-7, locate the first leaf, i.e., the lowest valued leaf with the lowest valued
stem. This represents a wait of ________ months. 15. ________
16. Referring to Scenario 2-8, if a frequency distribution with equal sized classes was made from this
data, and the first class was "0 but less than 10," the class midpoint of the third class would be 16. ________
________.
17. Referring to Scenario 2-11, if a frequency distribution for the defects data is constructed, using "0
but less than 5" as the first class, the relative frequency of the “15 but less than 20” class would 17. ________
be ________.
18. True or False: The sum of cumulative frequencies in a distribution always equals 18. ________
19. True or False: Histograms are used for numerical data while bar charts are suitable for
categorical data. 19. ________
20. Referring to Scenario 2-12, construct a table of row percentages. 20. ________
21. Referring to Scenario 2-12, if the sample is a good representation of the population, we can
expect _______ percent of the population will be males. 21. ________
SCENARIO 2-14
The table below contains the number of people who own a portable Blu-ray player in a sample of 600
broken down by gender.
Own a Portable
Blu-ray player Male Female
Yes 96 40
No 224 240
22. Referring to Scenario 2-14, construct a table of column percentages. 22. ________
23. Referring to Scenario 2-14, if the sample is a good representation of the population, we can
expect _______ percent of those who own a portable Blu-ray player in the population will be 23. ________
males.
SCENARIO 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with
their school with the higher scores represent higher level of satisfaction. Stem-and-Leaf Display Stem unit 10 Statistics 4 1 3 6 6 7 Sample Size 50 5 0 0 3 8 9 Mean 71.06 6 0 1 1 4 4 5 7 7 9 9 Median 73.5 7 0 0 0 1 3 4 4 5 5 6 6 6 7 8 8 Std. Deviation 14.13695 8 0 1 1 3 4 4 5 7 7 8 9 Minimum 41 9 0 2 2 7 Maximum 97
24. Referring to Scenario 2-18, how many students have a satisfaction level below 60? 24. ________
25. True or False: The Guidelines for Developing Visualizations recommend always starting the
scale for a vertical axis at zero. 25. ________