Question 1

Solve the problem.
-Sixteen workers were surveyed about how long it takes them to travel to work each day. The data below are given in minutes. Represent the data in a double-stem display. $\begin{array}{l}
2035422024372324\
2220412528273032
\end{array}$

Accepted Answer

A) 
 
B) 
 
C) 
 
D)

Question 2

Construct the specified histogram.
-In a survey, 20 voters were asked their age. The results are summarized in the frequency table below. Construct a histogram . 
$\begin{array} { c | c } 
\begin{array} { r } 
\text { Age of } \
\text { voters }
\end{array} & \begin{array} { r } 
\text { Number of } \
\text { voters }
\end{array} \
\hline 20 - 29 & 5 \
30 - 39 & 5 \
40 - 49 & 6 \
50 - 59 & 0 \
60 - 69 & 4
\end{array}$

Accepted Answer

The answer of Construct the specified histogram.
-In a survey, 20...

Question 3

Find the indicated probability.
-The table shows the percentage of college students who prefer a given pizza topping.  What is the probability that a randomly selected junior prefers meat toppings? Round to the nearest hundredth.

Accepted Answer

A) 0.21 
B) 0.06 
C) 0.35 
D) 0.17

Question 4

In a school survey, students showed these preferences for instructional materials. Answer the question. 
-About how many students would you expect to prefer radio in a school of 600 students?

Accepted Answer

A) About 30 students 
B) About 216 students 
C) About 108 students 
D) About 5 students

Question 5

Answer the question.
-The bar graph below shows the number of students by major in the College of Arts and Sciences.  Did twice as many students major in History as in Science?

Accepted Answer

A) No 
B) Yes

Question 6

Provide an appropriate response.
-Explain how two data sets could have equal means and modes but still differ greatly. Give
an example with two data sets to illustrate.

Accepted Answer

The answer of Provide an appropriate response.
-Explain how two data...

Question 7

Find the mean for the given frequency distribution.
-$\begin{array}{c|c}
\text { Value } & \text { Frequency } \
\hline 15 & 1 \
19 & 6 \
23 & 2 \
27 & 4 \
35 & 3
\end{array}$

Accepted Answer

A)  27.7 
B)  $24.3$ 
C)  $23.3$ 
D)  $7.4$

Question 8

Find the median for the given sample data.
-The normal monthly precipitation (in inches)for August is listed for 20 different U.S. cities. Find the median of the data. $\begin{array} { l l l l l } 3.5 & 1.6 & 2.4 & 3.7 & 4.1 \end{array}$
$\begin{array} { l l l l l } 3.9 & 1.0 & 3.6 & 4.2 & 3.4 \end{array}$
$\begin{array} { l l l l l } 3.7 & 2.2 & 1.5 & 4.2 & 3.4 \end{array}$
$\begin{array} { l l l l l } 2.7 & 0.4 & 3.7 & 2.0 & 3.6 \end{array}$

Accepted Answer

A)  $2.94 \mathrm { in }$. 
B)  $3.50 \mathrm { in }$. 
C)  $3.40 \mathrm { in }$. 
D)  $3.45 \mathrm { in }$.

Question 9

Find the mode or modes.
-Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mode(s).
 $\begin{array} { l l l } 54 & 61 & 62 \end{array}$
$\begin{array} { l l l } 51 & 56 & 63 \end{array}$
$68 \quad 58 \quad 52$

Accepted Answer

A)  No mode 
B)  $58.3$ 
C)  $54,61,62,51,56,63,68,58,52$ 
D)  58

Question 10

Use the graph to answer the question.
- Mike decides to buy shares of companies X and Y, which were initially selling for the same price. The changes in each stock's value over 90 days are shown in the graph above. Using the trend of
The graph at 90 days, do you expect the value of Stock X to increase or decrease over the upcoming
Days?

Accepted Answer

A) Decrease 
B) Increase

Question 11

Construct a frequency polygon.
-$\begin{array}{l|c}
\begin{array}{l}
\text { Hours worked } \
\text { per day }
\end{array} & \begin{array}{c}
\text { Number of } \
\text { employees }
\end{array} \
\hline 2-3 & 5 \
4-5 & 15 \
6-7 & 50 \
8-9 & 25 \
10-11 & 5
\end{array}$

Accepted Answer

A)  
 
B)

Question 12

Use this graph to answer the question. 
-What were the total sales for the first 6 months of 2009?

Accepted Answer

A) $240,000 
B) $366,000 
C) $290,000 
D) $46,000

Question 13

Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations.
-The Wellspring Company's fleet of trucks get 19, 12, 16, 8, 16, 9, and 25 miles per gallon. What is the mean miles per gallon for the fleet? Round to the nearest whole number.

Accepted Answer

A) 16 miles per gallon 
B) 14 miles per gallon 
C) 15 miles per gallon 
D) 18 miles per gallon

Question 14

Construct the specified histogram.
-The ages of the voters at a poll during a 20-minute period are listed below. Use five classes with a uniform width of 10 years, where the lower limit of the first class is 20 years.
 $\begin{array} { l } 
35294863643821234168 \
61424347333746272330
\end{array}$

Accepted Answer

A) 
 
B) 
 
C) 
 
D)

Question 15

Find the median.
-41, 14, 7, 7, 28, 13, 27, 32, 33, 31

Accepted Answer

A) 28 
B) 27 
C) 27.5 
D) 23

Question 16

Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations.
-Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age. 
$\begin{array} { l l l } 52 & 67 & 66 \end{array}$
$\begin{array} { l l l } 52 & 64 & 58 \end{array}$
$\begin{array} { l l l } 59 & 57 & 51 \end{array}$

Accepted Answer

A)  $58.0$ 
B)  $57.2$ 
C)  $58.4$ 
D)  $57.8$

Question 17

In a school survey, students showed these preferences for instructional materials. Answer the question. 
-About how many students would you expect to prefer films in a school of 1000 students?

Accepted Answer

A) About 200 students 
B) About 180 students 
C) About 20 students 
D) About 120 students

Question 18

useful for comparing the size of each category with the whole (ie the proportion of the whole population falling in each category). A bar graph is more useful for comparing the sizes of different categories with each other. Find the mean of the set of data.
-13, 12, 2, 4, 10, 15, 7, 9

Accepted Answer

A) 22 
B) 10.29 
C) 9 
D) 8

Question 19

Find the median for the given sample data.
-In ten trips to Las Vegas, a person had the following net gains:
 $\begin{array} { l l l l l } \$ 1730 & \$ 2685 & \$ 4237 & \$ 6343 & \$ 1629 \end{array}$
$\$ 2261 \$ 6091 \$ 7842 \quad \$ 6849 \quad \$ 4643$
 Find the median net gain.

Accepted Answer

A) $4440.00 
B) $4924.39 
C) $4237 
D) $4431.50

Question 20

Suppose that you want to construct a graph to represent the following data. $\begin{array} { c c } 
\text { Blood Type } & \text { Frequency } \
\hline \text { O } & 90 \
\text { A } & 84 \
\text { B } & 18 \
\text { AB } & 8
\end{array}$
 If you are mostly interested in the number of people in each category as a percentage of the total number of people, would a bar chart or a pie chart be more useful? Explain your
thinking.

Accepted Answer

The answer of Suppose that you want to construct a...

Exam 12: Statistics

Solve the problem. -Sixteen workers were surveyed about how long it takes them to travel to work each day. The data below are given in minutes. Represent the data in a double-stem display. $\begin{array}{l}2035422024372324\\2220412528273032\end{array}$

Find the indicated probability. -The table shows the percentage of college students who prefer a given pizza topping. What is the probability that a randomly selected junior prefers meat toppings? Round to the nearest hundredth.

In a school survey, students showed these preferences for instructional materials. Answer the question. -About how many students would you expect to prefer radio in a school of 600 students?

Answer the question. -The bar graph below shows the number of students by major in the College of Arts and Sciences. Did twice as many students major in History as in Science?

Provide an appropriate response. -Explain how two data sets could have equal means and modes but still differ greatly. Give an example with two data sets to illustrate.

Find the mean for the given frequency distribution. - $\begin{array}{c|c}\text { Value } & \text { Frequency } \\\hline 15 & 1 \\19 & 6 \\23 & 2 \\27 & 4 \\35 & 3\end{array}$

Find the mode or modes. -Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mode(s) . $\begin{array} { l l l } 54 & 61 & 62 \end{array}$ $\begin{array} { l l l } 51 & 56 & 63 \end{array}$ $68 \quad 58 \quad 52$

Use this graph to answer the question. -What were the total sales for the first 6 months of 2009?

Find the median. -41, 14, 7, 7, 28, 13, 27, 32, 33, 31

In a school survey, students showed these preferences for instructional materials. Answer the question. -About how many students would you expect to prefer films in a school of 1000 students?

useful for comparing the size of each category with the whole (ie the proportion of the whole population falling in each category) . A bar graph is more useful for comparing the sizes of different categories with each other. Find the mean of the set of data. -13, 12, 2, 4, 10, 15, 7, 9

Find the median for the given sample data. -In ten trips to Las Vegas, a person had the following net gains: $\begin{array} { l l l l l } \$ 1730 & \$ 2685 & \$ 4237 & \$ 6343 & \$ 1629 \end{array}$ $\$ 2261 \$ 6091 \$ 7842 \quad \$ 6849 \quad \$ 4643$ Find the median net gain.