Question 1

SCENARIO 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.Stem Leaves $$\begin{array} { l l } 
1 & 234447899 \
2 & 22223455678889 \
3 & 0011135778 \
4 & 02345579 \
5 & 112466 \
6 & 158
\end{array}$$
-Referring to Scenario 2-7, the civil suit with the fourth shortest waiting time between when the suit was filed and when it was adjudicated had a wait of months.

Accepted Answer

The answer of SCENARIO 2-7
The Stem-and-Leaf display below contains data...

Question 2

SCENARIO 2-8
The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility. $$\begin{array} { l l } 
\text { Stem } & \text { Leaves } \
\hline 0 & 01222223333334445666666667789999 \
1 & 1111222234444555669999 \
2 & 00011223455556889 \
3 & 0000446799 \
4 & 011345567 \
5 & 0077 \
6 & 8 \
7 & 67 \
8 & 3 \
9 & 0247
\end{array}$$
-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 relative frequency of the last class would be_.

Accepted Answer

The answer of SCENARIO 2-8
The Stem-and-Leaf display represents the number...

Question 3

SCENARIO 2-12
The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. $$\begin{array} { l c c c c } 
& \text { For } & \text { Neutral } &   \text { Against  } &   \text {Totals } \
\hline  \text { Female } & 38 & 54 & 12 & 104 \
\text { Male } & 12 & 36 & 48 & 96 \
\text { Totals } & 50 & 90 & 60 & 200
\end{array}$$
-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.

Accepted Answer

The answer of SCENARIO 2-12
The table below contains the opinions...

Question 4

You have collected data on the number of U.S.households actively using online banking and/or online bill payment over a 10-year period.Which of the following is the best for presenting the data?

Accepted Answer

A) A pie chart. 
B) A stem-and-leaf display 
C) A side-by-side bar chart. 
D) A time-series plot.

Question 5

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. $$\begin{array}{l}
\text { Own a Portable }\
\begin{array} { l r c } 
\text { Blu-ray player } & \text { Male } & \text { Female } \
\text { Yes } & 96 & 40 \
\text { No } & 224 & 240 \
\hline
\end{array}
\end{array}$$
-Referring to Scenario 2-14, of those who owned a portable Blu-ray player in the sample,percent were females.

Accepted Answer

The answer of SCENARIO 2-14
The table below contains the number...

Question 6

SCENARIO 2-15
The figure below is the ogive for fat (in grams) for a sample of 36 pizza products where the upper boundaries of the intervals are: 5, 10, 15, 20, 25, and 30.
 $\quad$ 
-Referring to Scenario 2-15, what percentage of pizza products contains between 10 and 25 grams of fat?

Accepted Answer

A) 14% 
B) 44% 
C) 62% 
D) 81%

Question 7

The sum of cumulative frequencies in a distribution always equals 1.

Accepted Answer

A) True 
 B)False

Question 8

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. 
-Referring to Scenario 2-18, if a student is randomly selected, his/her most likely level of satisfaction will be in the 60s among the 40s, 50s, 60s, 70s, 80s and 90s.

Accepted Answer

A) True 
 B)False

Question 9

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. $$\begin{array}{l}
\text { Own a Portable }\
\begin{array} { l r c } 
\text { Blu-ray player } & \text { Male } & \text { Female } \
\text { Yes } & 96 & 40 \
\text { No } & 224 & 240 \
\hline
\end{array}
\end{array}$$
-Referring to Scenario 2-14, of the females in the sample, percent did not own a portable Blu-ray player.

Accepted Answer

The answer of SCENARIO 2-14
The table below contains the number...

Question 10

A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

Accepted Answer

A) True 
 B)False

Question 11

Apple Computer, Inc.collected information on the age of their customers.Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it is best to use a pie chart.

Accepted Answer

A) True 
 B)False

Question 12

A side-by-side bar chart is two histograms plotted side-by-side.

Accepted Answer

A) True 
 B)False

Question 13

SCENARIO 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town. $$\begin{array} { c c } 
\text { Rentin } \$ &  { \text { Frequency } } \
1,100 \text { but less than } 1,200 & 113 \
1,200 \text { but less than } 1,300 & 85 \
1,300 \text { but less than } 1,400 & 32 \
1,400 \text { but less than } 1,500 & 16 \
1,500 \text { but less than } 1,600 & 4
\end{array}$$
-Referring to Scenario 2-9, percent of the apartments rented for $1,400 or more.

Accepted Answer

The answer of SCENARIO 2-9
The frequency distribution below represents the...

Question 14

You have collected data on the approximate retail price (in $) and the energy cost per year (in $)of 15 refrigerators.Which of the following is the best for presenting the data?

Accepted Answer

A) A pie chart. 
B) A scatter plot 
C) A side-by-side bar chart. 
D) A contingency table.

Question 15

A is a summary table in which numerical data are tallied into class intervals or categories.

Accepted Answer

The answer of A is a summary table in which...

Question 16

SCENARIO 2-13
Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with leaves in 10ths of gallons) in a day by 25 drive-through car wash operations in Phoenix. $$\begin{array} { l } 
9 \mid 147 \
10 \mid 02238 \
11 \mid 135566777 \
12 \mid 223489 \
13 \mid 02
\end{array}$$
-Referring to Scenario 2-13, if a percentage histogram for the detergent data is constructed,using "9.0 but less than 10.0 gallons" as the first class, what percentage of drive-through car wash operations use less than 12 gallons of detergent in a day?

Accepted Answer

The answer of SCENARIO 2-13
Given below is the stem-and-leaf display...

Question 17

In general, grouped frequency distributions should have between 5 and 15 class intervals.

Accepted Answer

A) True 
 B)False

Question 18

SCENARIO 2-7
The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court.Stem Leaves $$\begin{array} { l l } 
1 & 234447899 \
2 & 22223455678889 \
3 & 0011135778 \
4 & 02345579 \
5 & 112466 \
6 & 158
\end{array}$$
-Referring to Scenario 2-7, percent of the cases were adjudicated within the first 2 years.

Accepted Answer

The answer of SCENARIO 2-7
The Stem-and-Leaf display below contains data...

Question 19

SCENARIO 2-9
The frequency distribution below represents the rents of 250 randomly selected federally subsidized apartments in a small town. $$\begin{array} { c c } 
\text { Rentin } \$ &  { \text { Frequency } } \
1,100 \text { but less than } 1,200 & 113 \
1,200 \text { but less than } 1,300 & 85 \
1,300 \text { but less than } 1,400 & 32 \
1,400 \text { but less than } 1,500 & 16 \
1,500 \text { but less than } 1,600 & 4
\end{array}$$
-Referring to Scenario 2-9, the percentage of apartments renting for less than $1,400 is .

Accepted Answer

The answer of SCENARIO 2-9
The frequency distribution below represents the...

Question 20

SCENARIO 2-12
The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. $$\begin{array} { l c c c c } 
& \text { For } & \text { Neutral } &   \text { Against  } &   \text {Totals } \
\hline  \text { Female } & 38 & 54 & 12 & 104 \
\text { Male } & 12 & 36 & 48 & 96 \
\text { Totals } & 50 & 90 & 60 & 200
\end{array}$$
-Referring to Scenario 2-12, percent of the 200 were against the plan.

Accepted Answer

The answer of SCENARIO 2-12
The table below contains the opinions...

Exam 2: Organizing and Visualizing Variables

You have collected data on the number of U.S.households actively using online banking and/or online bill payment over a 10-year period.Which of the following is the best for presenting the data?

The sum of cumulative frequencies in a distribution always equals 1.

A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

Apple Computer, Inc.collected information on the age of their customers.Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it is best to use a pie chart.

A side-by-side bar chart is two histograms plotted side-by-side.

You have collected data on the approximate retail price (in $) and the energy cost per year (in $) of 15 refrigerators.Which of the following is the best for presenting the data?

A is a summary table in which numerical data are tallied into class intervals or categories.

In general, grouped frequency distributions should have between 5 and 15 class intervals.

Exam 2: Organizing and Visualizing Variables

You have collected data on the number of U.S.households actively using online banking and/or online bill payment over a 10-year period.Which of the following is the best for presenting the data?

SCENARIO 2-15 The figure below is the ogive for fat (in grams) for a sample of 36 pizza products where the upper boundaries of the intervals are: 5, 10, 15, 20, 25, and 30. \quad -Referring to Scenario 2-15, what percentage of pizza products contains between 10 and 25 grams of fat?

The sum of cumulative frequencies in a distribution always equals 1.

A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

Apple Computer, Inc.collected information on the age of their customers.Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers, it is best to use a pie chart.

A side-by-side bar chart is two histograms plotted side-by-side.

You have collected data on the approximate retail price (in $) and the energy cost per year (in $) of 15 refrigerators.Which of the following is the best for presenting the data?

A is a summary table in which numerical data are tallied into class intervals or categories.

In general, grouped frequency distributions should have between 5 and 15 class intervals.