Question 1

Write a sentence or two about the conditional relative frequency distribution of mode
of investment for clients age 50 or younger.

Accepted Answer

More clients $( 43 \% )$ age 50 or younger invested their retirement savings primarily in stocks rather than in any other mode of investment, $35 \%$ invested in mutual funds while only $22 \%$ invested in bonds.

Question 2

Consider the following side by side bar chart for the data above:   Does the chart indicate that mode of investment is independent of age? Explain.

Accepted Answer

The way clients invest for retirement does seem to be independent of age. These data provide little indication of a difference in mode of investing for retirement based on clients' ages at this firm.

Question 3

A newspaper examined the town's two hospitals and found that over the last six
months at Mercy Hospital 79% of the patients survived while at County Hospital 90%
survived. The table below summarizes the findings.

On closer investigation, it was observed that there was a difference in survival between patients who were admitted in poor condition or worse compared with patients admitted in fair condition or better. The following tables were created:
Patients admitted in poor condition or worse:
 
 Patients admitted in fair condition or better:

a) Fill in the four blanks in the two tables above with percentages.
b) Compare the percentages in the first table with those in the next two tables. Do you observe anything unusual?

Those who were admitted in fair condition or better have a very high rate of survival. Mercy Hospital has an over $50 \%$ of survival for those admitted in poor condition or worse whereas in the summary table, Mercy Hospital had a lower rate of survival.
c) Which hospital would you choose and why? .

Accepted Answer

It would be best to choose Mercy Hospital because it has the higher rate of survival for both conditions of admitted patients.

Question 4

A restaurant uses comment cards to get feedback from its customers about newly added items to the menu. It recently introduced homemade organic veggie burgers.
Customers who tried the new burger were asked if they would order it again. Which of
The following would be an appropriate method for displaying the data shown in the table? $$\begin{array} { | l | l | } 
\hline \text { Response } & \text { Frequency } \
\hline \text { Definitely would. } & 10 \
\hline \text { Most likely would. } & 40 \
\hline \text { Maybe } & 12 \
\hline \text { Definitely would not. } & 3 \
\hline
\end{array}$$

Accepted Answer

A)  Contingency table. 
B)  Segmented bar chart. 
C)  Pie chart. 
D)  Both A and B. 
E)  Both B and C. 
A)  Contingency table. 
B)  Segmented bar chart. 
C)  Pie chart. 
D)  Both A and B. 
E)  Both B and C.

Question 5

In May, 2010, the Pew Research Center for the People & the Press carried out a national survey to gauge opinion on the Arizona Immigration Law. Responses (Favor,
Oppose, Don't Know) were examined according to groups defined by political party
Affiliation (Democrat, Republican, Independent). Which of the following would be
Appropriate for displaying these data?

Accepted Answer

A)  Contingency table. 
B)  Pie charts. 
C)  Segmented bar chart. 
D)  Side by side bar chart. 
E)  All of the above. 
A)  Contingency table. 
B)  Pie charts. 
C)  Segmented bar chart. 
D)  Side by side bar chart. 
E)  All of the above.

Question 6

A company interested in the health of its employees started a health program including monitoring blood pressure. Based on age, employees were categorized according to ranges of blood pressure by age intervals. Data are shown in the table below.

$\text { Of all employees, the percentage of those under } 50 \text { years old is }$

Accepted Answer

A)  17.1% (82/480). 
B)  40.6% (195/480). 
C)  13.5% (65/480). 
D)  36.9% (72/195). 
E)  49.4% (285/480). 
A)  17.1% (82/480). 
B)  40.6% (195/480). 
C)  13.5% (65/480). 
D)  36.9% (72/195). 
E)  49.4% (285/480).

Question 7

Identify the variables and tell whether each is categorical or quantitative.

Accepted Answer

Mode of investment and age; mode of inve

Question 8

A automobile marketing firm conducts a study to see what types of cars people owned before buying an American car. The results are shown below. $$\begin{array} { | c | c | } 
\hline \text { Previous Ownership } & \text { Frequency } \
\hline \text { American } & 760 \
\hline \text { Japanese } & 375 \
\hline \text { Korean } & 72 \
\hline \text { German } & 37 \
\hline \text { Other } & 24 \
\hline \text { Total } & 1268 \
\hline
\end{array}$$ The relative frequency of those who owned Japanese cars previously who now bought American cars is

Accepted Answer

A)  59.9 % 
B)  29.6% 
C)  5.7% 
D)  14.9% 
E)  2.9% 
A)  59.9 % 
B)  29.6% 
C)  5.7% 
D)  14.9% 
E)  2.9%

Question 9

Prepare an appropriate chart to display the marginal distribution of brands.

Accepted Answer

Either a bar chart (

Question 10

Consider the following side by side bar chart for the data above:   Does the chart indicate that brand preference is independent of gender? Explain.

Accepted Answer

Brand preference appears to be independe

Question 11

A regional survey was carried out to gauge public opinion on the controversial Arizona Immigration Law. The results are displayed in the segmented bar chart below.
Which of the following statements is true?

Accepted Answer

A)  A greater percentage of Republicans oppose the law compared to Democrats. 
B)  A greater percentage of Republicans oppose the law compared to Independents. 
C)  Opinion about the law appears to be independent of political party affiliation. 
D)  A greater percentage of Democrats oppose the law compared to Republicans. 
E)  The segmented bar chart is not appropriate for these data. 
A)  A greater percentage of Republicans oppose the law compared to Democrats. 
B)  A greater percentage of Republicans oppose the law compared to Independents. 
C)  Opinion about the law appears to be independent of political party affiliation. 
D)  A greater percentage of Democrats oppose the law compared to Republicans. 
E)  The segmented bar chart is not appropriate for these data.

Question 12

What is the marginal distribution of age?

Accepted Answer

The answer of What is the marginal distribution of age?...

Question 13

Accenture, a consulting firm, conducted an online survey of 500 US consumers in September 2013. Based on their response to the question "What is your motive for
Shopping late in the season?" which of the following would be appropriate method(s) for
Displaying the male only data shown in the table? $$\begin{array} { | l | l | l | } 
\hline \text { Response } & \text { Male } & \text { Female } \
\hline \text { Too busy to shop earlier } & 115 & 75 \
\hline \text { More time to save for gifts } & 50 & 80 \
\hline \text { Better discounts available } & 65 & 20 \
\hline \text { Part of the holiday tradition } & 15 & 5 \
\hline \text { None of the above } & 120 & 60 \
\hline
\end{array}$$

Accepted Answer

A)  Contingency table. 
B)  Pie chart. 
C)  Segmented bar chart. 
D)  Side by side bar chart. 
E)  All of the above. 
A)  Contingency table. 
B)  Pie chart. 
C)  Segmented bar chart. 
D)  Side by side bar chart. 
E)  All of the above.

Question 14

Based on the side-by-side bar chart summarizing consumer preferences for various brands of digital cameras by gender, which of the following statement(s) are true?

Accepted Answer

A)  It appears that camera preference and gender are at least somewhat related. 
B)  If Other Brands are ignored, it appears that camera preference and gender are independent. 
C)  If Other Brands are ignored, it is not obvious that camera preference and gender are
Independent. 
D)  More males than females prefer Cannon. 
E)  More females than males prefer Sony. 
A)  It appears that camera preference and gender are at least somewhat related. 
B)  If Other Brands are ignored, it appears that camera preference and gender are independent. 
C)  If Other Brands are ignored, it is not obvious that camera preference and gender are
Independent. 
D)  More males than females prefer Cannon. 
E)  More females than males prefer Sony.

Question 15

A regional survey was carried out to gauge public opinion on the controversial Arizona Immigration Law (results shown below). Of respondents who are Democrat,
What percent oppose the law? $$\begin{array} { | l | l | l | l | } 
\hline \text { Response } & \text { Democrat } & \text { Republican } & \text { Independent } \
\hline \text { Favor } & 50 & 93 & 35 \
\hline \text { Oppose } & 85 & 45 & 60 \
\hline \text { Don't Know } & 5 & 7 & 20 \
\hline
\end{array}$$

Accepted Answer

A)  13% 
B)  35% 
C)  22% 
D)  45% 
E)  61% 
A)  13% 
B)  35% 
C)  22% 
D)  45% 
E)  61%

Question 16

A clothing store uses comment cards to get feedback from its customers about newly added items. It recently introduced plus size fashion wear. Customers who purchased
The items were asked to fill out an online comment survey giving 10% off the next
Purchase. The data are summarized in the table below. What percentage of customers
Would be less likely to purchase another item (Less or Not fully satisfied)? $$\begin{array} { | l | l | } 
\hline \text { Response } & \text { Frequency } \
\hline \text { Very satisfied. } & 15 \
\hline \text { Satisfied. } & 30 \
\hline \text { Less than fully satisfied. } & 12 \
\hline \text { Not satisfied. } & 4 \
\hline
\end{array}$$

Accepted Answer

A)  10% 
B)  15% 
C)  40% 
D)  50% 
E)  77% 
A)  10% 
B)  15% 
C)  40% 
D)  50% 
E)  77%

Question 17

Accenture, a consulting firm, conducted an online survey of 500 US consumers from in 2013. $$\begin{array} { | l | l | l | } 
\hline \text { Response } & \text { Male } & \text { Female } \
\hline \text { Too busy to shop earlier } & 115 & 75 \
\hline \text { More time to save for gifts } & 50 & 80 \
\hline \text { Better discounts available } & 65 & 20 \
\hline \text { Part of the holiday tradition } & 15 & 5 \
\hline \text { None of the above } & 120 & 60 \
\hline
\end{array}$$ What percentage of those who thought that better discounts were available on "Black
Friday" were female?

Accepted Answer

A)  81.3% 
B)  33.3% 
C)  11.1% 
D)  47.2% 
E)  23.5% 
A)  81.3% 
B)  33.3% 
C)  11.1% 
D)  47.2% 
E)  23.5%

Question 18

Accenture, a consulting firm, conducted an online survey of 500 US consumers in September, 2013. $$\begin{array} { | l | l | l | } 
\hline \text { Response } & \text { Male } & \text { Female } \
\hline \text { Too busy to shop earlier } & 115 & 75 \
\hline \text { More time to save for gifts } & 50 & 80 \
\hline \text { Better discounts available } & 65 & 20 \
\hline \text { Part of the holiday tradition } & 15 & 5 \
\hline \text { None of the above } & 120 & 60 \
\hline
\end{array}$$ What percentage of consumers thought that shopping on "Black Friday" is part of the
Holiday tradition?

Accepted Answer

A)  8.3% 
B)  33.3% 
C)  11.1% 
D)  12.5% 
E)  75.0% 
A)  8.3% 
B)  33.3% 
C)  11.1% 
D)  12.5% 
E)  75.0%

Question 19

Accenture, a consulting firm, conducted an online survey of 500 US consumers in September 2013. Based on their response to the question "What is your motive for
Shopping late in the season?" which of the following would be an appropriate method for
Displaying the data shown in the table? $$\begin{array} { | l | l | l | } 
\hline \text { Response } & \text { Male } & \text { Female } \
\hline \text { Too busy to shop earlier } & 115 & 75 \
\hline \text { More time to save for gifts } & 50 & 80 \
\hline \text { Better discounts available } & 65 & 20 \
\hline \text { Part of the holiday tradition } & 15 & 5 \
\hline \text { None of the above } & 120 & 60 \
\hline
\end{array}$$

Accepted Answer

A)  Contingency table. 
B)  Pie charts. 
C)  Segmented bar chart. 
D)  Side by side bar chart. 
E)  All of the above. 
A)  Contingency table. 
B)  Pie charts. 
C)  Segmented bar chart. 
D)  Side by side bar chart. 
E)  All of the above.

Question 20

A restaurant uses comment cards to get feedback from its customers about newly added items to the menu. It recently introduced homemade organic veggie burgers.
Customers who tried the new burger were asked if they would order it again. The data
Are summarized in the table below. What percentage of customers would most likely or
Definitely order the veggie burger again? $$\begin{array} { | l | l | } 
\hline \text { Response } & \text { Frequency } \
\hline \text { Definitely would. } & 10 \
\hline \text { Most likely would. } & 40 \
\hline \text { Maybe } & 12 \
\hline \text { Definitely would not. } & 3 \
\hline
\end{array}$$

Accepted Answer

A)  10% 
B)  15% 
C)  40% 
D)  50% 
E)  77% 
A)  10% 
B)  15% 
C)  40% 
D)  50% 
E)  77%

Write a sentence or two about the conditional relative frequency distribution of mode of investment for clients age 50 or younger.

Consider the following side by side bar chart for the data above: Does the chart indicate that mode of investment is independent of age? Explain.

Identify the variables and tell whether each is categorical or quantitative.

Prepare an appropriate chart to display the marginal distribution of brands.

Consider the following side by side bar chart for the data above: Does the chart indicate that brand preference is independent of gender? Explain.

A regional survey was carried out to gauge public opinion on the controversial Arizona Immigration Law. The results are displayed in the segmented bar chart below. Which of the following statements is true?

What is the marginal distribution of age?

Based on the side-by-side bar chart summarizing consumer preferences for various brands of digital cameras by gender, which of the following statement(s) are true?

A regional survey was carried out to gauge public opinion on the controversial Arizona Immigration Law (results shown below). Of respondents who are Democrat, What percent oppose the law? Response Democrat Republican Independent Favor 50 93 35 Oppose 85 45 60 Don't Know 5 7 20

Data and Decisions

Displaying and Describing Quantitative Data

Correlation and Linear Regression

Randomness and Probability

Random Variables and Probability Models

The Normal and Other Continuous Distributions

Surveys and Sampling

Sampling Distributions and Confidence Intervals for Proportions

Testing Hypotheses About Proportions

Confidence Intervals and Hypothesis Tests for Means

Comparing Two Means

Inference for Counts: Chi-Square Tests

Inference for Regression

Multiple Regression

Introduction to Data Mining

Filters

Exam 2: Displaying and Describing Categorical Data

Write a sentence or two about the conditional relative frequency distribution of mode of investment for clients age 50 or younger.

Consider the following side by side bar chart for the data above: Does the chart indicate that mode of investment is independent of age? Explain.

Identify the variables and tell whether each is categorical or quantitative.

Prepare an appropriate chart to display the marginal distribution of brands.

Consider the following side by side bar chart for the data above: Does the chart indicate that brand preference is independent of gender? Explain.

A regional survey was carried out to gauge public opinion on the controversial Arizona Immigration Law. The results are displayed in the segmented bar chart below. Which of the following statements is true?

What is the marginal distribution of age?

Based on the side-by-side bar chart summarizing consumer preferences for various brands of digital cameras by gender, which of the following statement(s) are true?

A regional survey was carried out to gauge public opinion on the controversial Arizona Immigration Law (results shown below). Of respondents who are Democrat, What percent oppose the law? Response Democrat Republican Independent Favor 50 93 35 Oppose 85 45 60 Don't Know 5 7 20

Data and Decisions

Displaying and Describing Quantitative Data

Correlation and Linear Regression

Randomness and Probability

Random Variables and Probability Models

The Normal and Other Continuous Distributions

Surveys and Sampling

Sampling Distributions and Confidence Intervals for Proportions

Testing Hypotheses About Proportions

Confidence Intervals and Hypothesis Tests for Means

Comparing Two Means

Inference for Counts: Chi-Square Tests

Inference for Regression

Multiple Regression

Introduction to Data Mining

Filters