Question 1

In 2002 data were collected on the percent of people in the U.S. not covered by
Health insurance. Summary statistics and a histogram for these data are shown below.
The IQR for these data is $$\begin{array}{l}
\begin{array} { | c | c | c | c | c | c | c | } 
\hline \text { Min } & \text { Q1 } & \text { Median } & \text { Q3 } & \text { Max } & \text { Mean } & \text { SD } \
\hline 7.9 & 10.8 & 13.4 & 16.7 & 25.8 & 13.9 & 3.6 \
\hline
\end{array}\
\end{array}$$

Accepted Answer

A)   16.7 %
B)   5.9 %
C)   17.9 %
D)   3.6 %
E)   13.4  B

Question 2

A manufacturer of cable wire periodically selects samples to monitor the process.
A sample of ten wires is selected and the diameters (in cm.) are 0.493, 0.534, 0.527,0.511, 0.565, 0.559, 0.519, 0.562, 0.551, and 0.530. The mean diameter is

Accepted Answer

A)   0.455 cm.
B)   0.535 cm.
C)   0.511 cm.
D)   0.565 cm.
E)   0.499 cm. B

Question 3

Boxplots of earnings per share (EPS) data for a sample of retail company stocks
And a sample of energy company stocks are shown below. Which of the following
Statements is correct?

Accepted Answer

A)   The median EPS is higher for energy stocks compared to retail stocks.
B)   The median EPS is higher for retail stocks compared to energy stocks.
C)   The IQR for the EPS data is larger for retail stocks than for energy stocks.
D)   The EPS data are more variable for retail stocks than for energy stocks.
E)   The mean is higher for energy stocks compared to retail stocks. B

Question 4

Real estate agencies also keep track of housing prices in a given area. Suppose
They also provide their clients with quarterly median selling prices for homes in a given
Area for the past three year period. These data are

Accepted Answer

A)   Cross-sectional
B)   Time Series
C)   Categorical
D)   Nominal
E)   Ordinal

Question 5

A magazine that publishes product reviews conducted a survey of teenagers'
Preferences for cell phones. Three brands of cell phone designed specifically with teens
In mind were the focus of the study. The table summarizes responses by brand and
Gender. What percent of teenagers preferred LG Rumor? $$\begin{array} { | l | l | l | } 
\hline \text { Cell Phone } & \text { Male } & \text { Female } \
\hline \text { LG Rumor } & 55 & 87 \
\hline \text { Sidekick LX } & 99 & 150 \
\hline \text { BlackJack II } & 196 & 113 \
\hline
\end{array}$$

Accepted Answer

A)   50%
B)   41%
C)   25%
D)   16%
E)   20%

Question 6

A customer service center keeps track of the number of complaints received each
Day about one of their new products. The numbers of complaints received over the last
11 day period are 19, 18, 22, 21, 17, 18, 22, 19, 16, 23, and 25. The IQR for this sample
Of data is

Accepted Answer

A)   25. 
B)   22.
C)   18.
D)   9.
E)   4.

Question 7

A government agency has 6000 employees. As an alternative to the traditional
Five day work week, employees were asked whether they preferred a four day work week
(10 hours per day) or flexible hours. The table below shows the results by age category.
The most appropriate display for these data is a $$\begin{array} { | l | l | l | } 
\hline \text { Age Category } & \begin{array} { l } 
\text { Prefers 4 } \
\text { Day Week }
\end{array} & \begin{array} { l } 
\text { Prefers } \
\text { Flex Hours }
\end{array} \
\hline \text { Under 30 } & 600 & 300 \
\hline 30 - 45 & 1200 & 1500 \
\hline \text { Over 45 } & 2100 & 300 \
\hline
\end{array}$$

Accepted Answer

A)   histogram.
B)   stem and leaf display.
C)   boxplot.
D)   segmented bar chart.
E)   frequency table.

Question 8

What scale of measurement is the style of a home (colonial, split level, ranch etc)?

Accepted Answer

A)   Nominal
B)   Interval
C)   Quantitative
D)   Ordinal
E)   Numerical

Question 9

A recent survey of online shoppers asked them to indicate the primary reason they
Shop via the Internet. The table summarizes responses by reason and gender. What
Percent of respondents cite Convenience as the primary reason they shop online? $$\begin{array} { | l | l | l | } 
\hline \text { Reason for Shopping Online } & \text { Male } & \text { Female } \
\hline \text { Convenience } & 249 & 90 \
\hline \text { Better Prices } & 110 & 99 \
\hline \text { Greater Selection } & 41 & 211 \
\hline
\end{array}$$

Accepted Answer

A)   42%
B)   23%
C)   62%
D)   85%
E)   33%

Question 10

A magazine that publishes product reviews conducted a survey of teenagers'
Preferences for cell phones. Three brands of cell phone designed specifically with teens
In mind were the focus of the study. The table summarizes responses by brand and
Gender. What percent of teenagers who preferred the BlackJack II were males? $$\begin{array} { | l | l | l | } 
\hline \text { Cell Phone } & \text { Male } & \text { Female } \
\hline \text { LG Rumor } & 55 & 87 \
\hline \text { Sidekick LX } & 99 & 150 \
\hline \text { BlackJack II } & 196 & 113 \
\hline
\end{array}$$

Accepted Answer

A)   63%
B)   32%
C)   16%
D)   50%
E)   41%

Question 11

A customer service center keeps track of the number of complaints received each
Day about one of their new products. The numbers of complaints received over the last
11 day period are 19, 18, 22, 21, 17, 18, 22, 19, 16, 23, and 25. The standard deviation
For this sample of data is

Accepted Answer

A)   0.842. 
B)   2.794.
C)   1.845.
D)   0.569.
E)   None of the above..

Question 12

Suppose a sample of 60 cans of soda has a mean of 12.1 ounces and a standard
Deviation of 0.05 ounces. If a can of soda has 12 ounces, what is its corresponding z
Score?

Accepted Answer

A)   2.0
B)   -2.0
C)   1.8
D)   -3.0
E)   -1.8

Question 13

A manufacturer of cable wire periodically selects samples to monitor the process.
A sample of ten wires is selected and the diameters (in cm.) are 0.493, 0.534, 0.527,0.511, 0.565, 0.559, 0.519, 0.562, 0.551, and 0.530. The standard deviation is

Accepted Answer

A)   0.455 cm.
B)   0.005 cm.
C)   0.045 cm.
D)   0.024 cm.
E)   0.099 cm.

Question 14

A magazine that publishes product reviews conducted a survey of teenagers'
Preferences for cell phones. Three brands of cell phone designed specifically with teens
In mind were the focus of the study. The table summarizes responses by brand and
Gender. Which of the following charts would be appropriate for displaying the marginal
Distribution of brands? $$\begin{array} { | l | l | l | } 
\hline \text { Cell Phone } & \text { Male } & \text { Female } \
\hline \text { LG Rumor } & 55 & 87 \
\hline \text { Sidekick LX } & 99 & 150 \
\hline \text { BlackJack II } & 196 & 113 \
\hline
\end{array}$$

Accepted Answer

A)   Histogram
B)   Boxplot
C)   Pie Chart
D)   Line Graph
E)   Stem and Leaf Display

Question 15

An advocacy group is investigating whether gender has an effect on job category
In large investment firms. She surveyed a sample of firms with the results shown below.
The most appropriate display for these data is a $$\begin{array} { | l | l | l | } 
\hline \text { Job Category } & \text { Male } & \text { Female } \
\hline \text { Clerical / Technical } & 85 & 215 \
\hline \text { Professional Staff } & 720 & 480 \
\hline \text { Executive / Managerial } & 400 & 100 \
\hline
\end{array}$$

Accepted Answer

A)   histogram.
B)   stem and leaf display.
C)   boxplot.
D)   segmented bar chart.
E)   frequency table.

Question 16

A magazine that publishes product reviews conducted a survey of teenagers'
Preferences for cell phones. Three brands of cell phone designed specifically with teens
In mind were the focus of the study. The table summarizes responses by brand and
Gender. What percent of female teenagers preferred the Sidekick LX? $$\begin{array} { | l | l | l | } 
\hline \text { Cell Phone } & \text { Male } & \text { Female } \
\hline \text { LG Rumor } & 55 & 87 \
\hline \text { Sidekick LX } & 99 & 150 \
\hline \text { BlackJack II } & 196 & 113 \
\hline
\end{array}$$

Accepted Answer

A)   43%
B)   60%
C)   21%
D)   50%
E)   16%

Question 17

The U.S. Bureau of Labor Statistics (BLS) compiles data on a number of
Variables. Which of the following BLS variables is categorical?

Accepted Answer

A)   Consumer expenditures
B)   Type of workplace injuries
C)   Wages by occupation
D)   Employment costs
E)   Productivity by industry

Question 18

Boxplots of earnings per share (EPS) data for a sample of retail company stocks
And a sample of energy company stocks are shown below. Which of the following
Statement is true about the distributions of EPS for retail and energy stocks?

Accepted Answer

A)   The distribution of EPS for retail stocks is skewed to the right.
B)   The distribution of EPS for energy stocks is symmetric.
C)   Both distributions of EPS are symmetric.
D)   The distribution of EPS for retail stocks is skewed to the left.
E)   The distribution of EPS for energy stocks is skewed to the left.

Question 19

In 2002 data were collected on the percent of people in the U.S. not covered by
Health insurance. Summary statistics and a histogram for these data are shown below.
What is the most appropriate measure to describe the center of these data? $$\begin{array}{l}
\begin{array} { | c | c | c | c | c | c | c | } 
\hline \text { Min } & \text { Q1 } & \text { Median } & \text { Q3 } & \text { Max } & \text { Mean } & \text { SD } \
\hline 7.9 & 10.8 & 13.4 & 16.7 & 25.8 & 13.9 & 3.6 \
\hline
\end{array}\
\end{array}$$

Accepted Answer

A)   Range
B)   Mean
C)   Standard Deviation
D)   Median
E)   IQR

Question 20

A researcher is conducting a study on eating disorders. Using a list of recent
Participants in the online Weight Watchers program, she randomly selects a name from
The alphabetized list. She then chooses every tenth person from that point on to include
In her study. This sampling strategy is called

Accepted Answer

A)   Systematic
B)   Cluster
C)   Random
D)   Stratified
E)   Judgmental

Exam 26: Exploring and Collecting Data

A manufacturer of cable wire periodically selects samples to monitor the process. A sample of ten wires is selected and the diameters (in cm.) are 0.493, 0.534, 0.527,0.511, 0.565, 0.559, 0.519, 0.562, 0.551, and 0.530. The mean diameter is

Boxplots of earnings per share (EPS) data for a sample of retail company stocks And a sample of energy company stocks are shown below. Which of the following Statements is correct?

Real estate agencies also keep track of housing prices in a given area. Suppose They also provide their clients with quarterly median selling prices for homes in a given Area for the past three year period. These data are

A customer service center keeps track of the number of complaints received each Day about one of their new products. The numbers of complaints received over the last 11 day period are 19, 18, 22, 21, 17, 18, 22, 19, 16, 23, and 25. The IQR for this sample Of data is

What scale of measurement is the style of a home (colonial, split level, ranch etc) ?

A customer service center keeps track of the number of complaints received each Day about one of their new products. The numbers of complaints received over the last 11 day period are 19, 18, 22, 21, 17, 18, 22, 19, 16, 23, and 25. The standard deviation For this sample of data is

Suppose a sample of 60 cans of soda has a mean of 12.1 ounces and a standard Deviation of 0.05 ounces. If a can of soda has 12 ounces, what is its corresponding z Score?

A manufacturer of cable wire periodically selects samples to monitor the process. A sample of ten wires is selected and the diameters (in cm.) are 0.493, 0.534, 0.527,0.511, 0.565, 0.559, 0.519, 0.562, 0.551, and 0.530. The standard deviation is

The U.S. Bureau of Labor Statistics (BLS) compiles data on a number of Variables. Which of the following BLS variables is categorical?

Boxplots of earnings per share (EPS) data for a sample of retail company stocks And a sample of energy company stocks are shown below. Which of the following Statement is true about the distributions of EPS for retail and energy stocks?

A researcher is conducting a study on eating disorders. Using a list of recent Participants in the online Weight Watchers program, she randomly selects a name from The alphabetized list. She then chooses every tenth person from that point on to include In her study. This sampling strategy is called