Question 1

Which of the following cumulative frequency distribution corresponds to the given frequency distribution? $\begin{array}{r|c}
\text { Weight (oz) } & \begin{array}{c}
\text { Number } \
\text { of Stones }
\end{array} \
\hline 1.2-1.6 & 5 \
1.7-2.1 & 2 \
2.2-2.6 & 5 \
2.7-3.1 & 5 \
3.2-3.6 & 13
\end{array}$

A)
$\begin{array}{r|c}
\text { Weight (oz) } & \begin{array}{l}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline 1.2-1.6 & 5 \
1.7-2.1 & 7 \
2.2-2.6 & 12 \
2.7-3.1 & 17 \
3.2-3.6 & 30
\end{array}$

B)
$\begin{array}{c|c}
\text { Weight (oz) } & \begin{array}{c}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline \text { Less than 2.2 } & 7 \
\text { Less than 3.2 } & 17 \
\text { Less than 3.7 } & 30
\end{array}$

C)
$\begin{array}{c|c}
\text { Weight (oz) } & \begin{array}{c}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline \text { Less than 1.7 } & 5 \
\text { Less than 2.2 } & 7 \
\text { Less than 2.7 } & 12 \
\text { Less than 3.2 } & 17 \
\text { Less than 3.7 } & 30
\end{array}$

D)
$\begin{array}{c|c}
\text { Weight (oz) } & \begin{array}{c}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline \text { Less than 1.7 } & 5 \
\text { Less than 2.2 } & 7 \
\text { Less than } 2.7 & 12 \
\text { Less than } 3.2 & 17 \
\text { Less than } 3.7 & 28
\end{array}$

Accepted Answer

The cumulative frequency is calculated by adding each frequency from the frequency distribution table to the sum of its predecessors. The correct cumulative frequencies are: 5, 7, 12, 17, and 30.

Question 2

The frequency distribution below summarizes employee years of service for Alpha Corporation. Find the class midpoint for class 1 -5. $\begin{array}{c|c}
\text { Years of Service } & \text { Frequency } \
\hline 1-5 & 5 \
6-10 & 20 \
11-15 & 25 \
16-20 & 10 \
21-25 & 5 \
26-30 & 3
\end{array}$

A) $3.5$ years
B) $3.0$ years
C) $5.0$ years
D) $2.5$ years

Accepted Answer

B

Question 3

A store manager counts the number of customers who make a purchase in his store each day. The data are as follows. $\begin{array} { l l l l l l l l l l } 
10 & 11 & 8 & 14 & 7 & 10 & 10 & 11 & 8 & 7
\end{array}$
Which of these choices display the correct dotplot?

A) Number of Customers Per Day

B) Number of Customers Per Day

C) Number of Customers Per Day

D) Number of Customers Per Day

Accepted Answer

A

Question 4

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40 years. The blood pressure readings (in mm Hg)were given to the Nearest whole number. What class width was used to construct the relative frequency
Distribution? 
A)0.35%
B)3.5%
C)30%
D)35%

Accepted Answer

The answer of A nurse measured the blood pressure of...

Question 5

Which choice displays the best graphic display of the amount of nitrous oxide (NO explained by the amount of carbon monoxide (CO)emissions in million metric tons over a Ten year period in the United States? The data set is below: $\begin{array}{|l|l|l|l|l|l|l|l|l|l|l|}
\hline \text { CO } & 5638 & 5708 & 5893 & 5807 & 5881 & 5939 & 6024 & 6032 & 5946 & 6022 \
\hline \text { NO } & 351 & 349 & 345 & 339 & 335 & 335 & 362 & 371 & 376 & 384 \
\hline
\end{array}$

A)Nitrous Oxide (NO) and Carbon Monoxide (CO)
 Emissions in the U.S. ever Ten Years

B) Nitrous Oxide (NO) and Carbon Monoxide $ (\mathrm{CO}) $
 Emissions in the U.S. over Ten Years

C) Nitrous Oxide (NO) and Carbon Monoxide (CO)
 Emissions in the U.S. over TenYears

D) Nitrous Oxide (NO) and Carbon Monoxide (CO)
 Emissions in the U.S. over Ten Years

Accepted Answer

The answer of Which choice displays the best graphic display...

Question 6

Analysis of the data from 25 mothers indicates that an infant's birth weight (g),  y , can be estimated by a mother's weight  (kg), x , using the regression equation  y=31 x+1501 .  If a mother's weight is  70 kg , the infant's birth weight can be estimated as  ________ g .
A) 48,701
B) 1718
C) 46
D) 3671

Accepted Answer

Using the regression equation $y = 31x + 1501$, for a mother's weight of 70 kg, the infant's birth weight can be estimated as $y = 31(70) + 1501 = 2170 + 1501 = 3671$ grams.

Question 7

The two key parts of a regression equation involve the ____________ and the y-____________.
A) slope; intercept
B) asymptote; intercept
C) slope; axis
D) asymptote; axis

Accepted Answer

The two key parts of a regression equation are the slope, which measures the steepness or incline of the line, and the y-intercept, which is the point where the line crosses the y-axis.

Question 8

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40 years. The blood pressure readings were given to the nearest Whole number. Approximately what percentage of the people aged 25 -40 had a systolic Blood pressure reading between 110 and 119 mm Hg inclusive?
Systolic Blood Pressure for People Aged 25 - 40 Years

Systolic Blood Pressure (mm Hg)
A) $0.35 \%$
B) $3.5 \%$
C) $30 \%$
D) $35 \%$

Accepted Answer

The answer of A nurse measured the blood pressure of...

Question 9

Identify the cumulative frequency distribution that corresponds to the given frequency $\begin{array}{r|c}
\text { Speed } & \begin{array}{l}
\text { Number } \
\text { of Cars }
\end{array} \
\hline 0-29 & 4 \
30-59 & 16 \
60-89 & 60 \
90-119 & 20
\end{array}$

A)
$\begin{array}{r|c}
\text { Speed } & \begin{array}{c}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline \text { Less than } 30 & 4 \
\text { Less than } 60 & 20 \
\text { Less than 90 } & 80 \
\text { Less than 120 } & 100
\end{array}$
B)
$\begin{array}{r|c}
\text { Speed } & \begin{array}{c}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline \text { Less than } 30 & 0.04 \
\text { Less than } 60 & 0.20 \
\text { Less than } 90 & 0.80 \
\text { Less than } 120 & 1.00
\end{array}$

C)
$\begin{array}{r|c}
\text { Speed } & \begin{array}{c}
\text { Cumulative } \
\text { Frequency }
\end{array} \
\hline 0-29 & 4 \
30-59 & 20 \
60-89 & 80 \
90-119 & 100
\end{array}$

D)
$\begin{array}{r|c} 
& \begin{array}{c}
\text { Cumulative } \
\text { Speed }
\end{array} \
\hline \text { Frequency } \
\hline \text { Less than } 30 & 100 \
\text { Less than 60 } & 80 \
\text { Less than 90 } & 82 \
\text { Less than } 120 & 4
\end{array}$

Accepted Answer

Option A correctly adds the frequencies cumulatively: 4 cars are less than 30, adding 16 more makes 20 less than 60, adding 60 more makes 80 less than 90, and adding the final 20 makes 100 less than 120.

Question 10

The following data show the number of laps run by each participant in a marathon. $\begin{array} { l l l l l l l l l l l l } 46 & 65 & 55 & 43 & 51 & 48 & 57 & 30 & 43 & 49 & 32 & 56 \end{array}$
Which of these choices display the correct stemplot?
A)

B)

Accepted Answer

The answer of The following data show the number of...

Question 11

The weights (in pounds)of 22 members of the junior varsity football team are listed below. $\begin{array} { l l l l l l l l l l l } 144 & 152 & 142 & 151 & 160 & 152 & 131 & 164 & 141 & 153 & 140 \end{array}$
$\begin{array} { l l l l l l l l l l l } 144 & 175 & 156 & 147 & 133 & 172 & 159 & 135 & 159 & 148 & 171 \end{array}$
Which of these choices display the correct stemplot?
A)

B)

Accepted Answer

The answer of The weights (in pounds)of 22 members of...

Question 12

The scatterplot below displays the amount of nitrous oxide (NO)explained by the amount of carbon monoxide (CO)emissions in million metric tons over a ten year period in the United States. Select the choice that best describes any relationship between the variables. 
A) There is a negative linear association between NO and CO.
B) There is a positive linear association between NO and CO.
C) Overall, there is no noticeable relationship between NO and CO.
D) NO can be explained by CO.

Accepted Answer

The answer of The scatterplot below displays the amount of...

Question 13

Analysis of the data from 25 mothers indicates that an infant's birth weight  (g), y , can be estimated by a mother's weight ( kg),  x , using the regression equation  y=31 x+1501 . For every _______ kg  increase in a mother's weight, the infant's birth weight increases by _______g.
A)  31 ; 1501 
B)  1 ; 31 
C)  31 ; 1 
D)  1501 ; 31

Accepted Answer

The coefficient of x (31) represents the increase in the dependent variable (y, infant's birth weight) for every one unit increase in the independent variable (x, mother's weight). Therefore, for every 1 kg increase in a mother's weight, the infant's birth weight increases by 31 g.

Question 14

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40 years. The blood pressure readings were given to the nearest
Whole number. Approximately what percentage of the people aged 25 -40 had a systolic
Blood pressure reading between 110 and 139 mm Hg inclusive? Systolic Blood Pressure for People Aged 25 - 40 Years

Systolic Blood Pressure (mm Hg)
A) $75 \%$
B) $89 \%$
C) $59 \%$
D) $39 \%$

Accepted Answer

The answer of A nurse measured the blood pressure of...

Question 15

The following frequency distribution analyzes the scores on a math test. Find the class boundaries of scores interval 90-99. $\begin{array}{cc}
\hline \text { Scores } & \text { Number of Students } \
\hline 50-59 & 2 \
60-69 & 4 \
70-79 & 6 \
80-89 & 15 \
90-99 & 5 \
\hline
\end{array}$

A) $89.5,100.5$
B) $89.5,100.5$.
C) $90.5,99.5$
D) $89.5,99.5$

Accepted Answer

The class boundaries are the lower and upper limits of the class interval. The lower boundary of the class interval 90-99 is 89.5, and the upper boundary is 99.5.

Question 16

$\begin{array} { c c c c c c c c c } 
x & 0.51 & 0.02 & 0.14 & 0.29 & 0.34 & 0.8 & 0.47 & 0.71 \
y & 0.31 & 0.46 & - 0.12 & 0.34 & - 0.05 & 0.8 & 0.35 & 0.47
\end{array}$ Which of these choices display the correct scatterplot? 
A)

B)

C)

D)

Accepted Answer

The answer of \(\begin{array} { c c c c c...

Question 17

The following frequency distribution represents the scores on a math test. Find the class midpoint of scores for the interval 40-59. $\begin{array}{cc}
\hline \text { Scores } & \text { Number of students } \
\hline 50-59 & 2 \
60-69 & 4 \
70-79 & 6 \
80-89 & 15 \
90-99 & 5 \
\hline
\end{array}$

A) $50.5$
B) $48.5$
C) $49.5$
D) $49.0$

Accepted Answer

The class midpoint is calculated by averaging the lower and upper boundaries of the class interval. For the interval 40-59, the midpoint is $(40 + 59) / 2 = 49.5$.

Question 18

The attendance counts for this season's basketball games are listed below. Which of these choices display the correct stemplot? $\begin{array} { l l l l } 227 & 239 & 215 & 219 \end{array}$
$\begin{array} { l l l l } 221 & 233 & 229 & 233 \end{array}$
$\begin{array} { l l l l } 235 & 228 & 245 & 231 \end{array}$
A)

B)

Accepted Answer

The answer of The attendance counts for this season's basketball...

Question 19

The histogram below represents the number of television sets per household for a sample of U.S. households. What is the sample size? Number of Television Sets Per U.S. Household

A) 100 households
B) 5 households
C) 50 households
D) 90 households

Accepted Answer

The answer of The histogram below represents the number of...

Question 20

The Kappa Iota Sigma Fraternity polled its members on the weekend party theme. The vote was as follows: six for toga, four for hayride, eight for luau, and two for masquerade. Display the vote count in a Pareto chart. 
A)

B)

C)

D)

Accepted Answer

The answer of The Kappa Iota Sigma Fraternity polled its...

Quiz 2: Exploring Data With Tables and Graphs

The frequency distribution below summarizes employee years of service for Alpha Corporation. Find the class midpoint for class 1 -5. $\begin{array}{c|c}\text { Years of Service } & \text { Frequency } \\\hline 1-5 & 5 \\6-10 & 20 \\11-15 & 25 \\16-20 & 10 \\21-25 & 5 \\26-30 & 3\end{array}$

A store manager counts the number of customers who make a purchase in his store each day. The data are as follows. $\begin{array} { l l l l l l l l l l } 10 & 11 & 8 & 14 & 7 & 10 & 10 & 11 & 8 & 7\end{array}$ Which of these choices display the correct dotplot?

Analysis of the data from 25 mothers indicates that an infant's birth weight (g) , y , can be estimated by a mother's weight (kg) , x , using the regression equation y=31 x+1501 . If a mother's weight is 70 kg , the infant's birth weight can be estimated as ________ g .

The two key parts of a regression equation involve the and the y-.

Identify the cumulative frequency distribution that corresponds to the given frequency $\begin{array}{r|c}\text { Speed } & \begin{array}{l}\text { Number } \\\text { of Cars }\end{array} \\\hline 0-29 & 4 \\30-59 & 16 \\60-89 & 60 \\90-119 & 20\end{array}$

The following data show the number of laps run by each participant in a marathon. $\begin{array} { l l l l l l l l l l l l } 46 & 65 & 55 & 43 & 51 & 48 & 57 & 30 & 43 & 49 & 32 & 56 \end{array}$ Which of these choices display the correct stemplot?

The scatterplot below displays the amount of nitrous oxide (NO) explained by the amount of carbon monoxide (CO) emissions in million metric tons over a ten year period in the United States. Select the choice that best describes any relationship between the variables.

Analysis of the data from 25 mothers indicates that an infant's birth weight (g) , y , can be estimated by a mother's weight ( kg) , x , using the regression equation y=31 x+1501 . For every _ kg increase in a mother's weight, the infant's birth weight increases by _g.

The following frequency distribution analyzes the scores on a math test. Find the class boundaries of scores interval 90-99. $\begin{array}{cc}\hline \text { Scores } & \text { Number of Students } \\\hline 50-59 & 2 \\60-69 & 4 \\70-79 & 6 \\80-89 & 15 \\90-99 & 5 \\\hline\end{array}$

$\begin{array} { c c c c c c c c c } x & 0.51 & 0.02 & 0.14 & 0.29 & 0.34 & 0.8 & 0.47 & 0.71 \\y & 0.31 & 0.46 & - 0.12 & 0.34 & - 0.05 & 0.8 & 0.35 & 0.47\end{array}$ Which of these choices display the correct scatterplot?

The following frequency distribution represents the scores on a math test. Find the class midpoint of scores for the interval 40-59. $\begin{array}{cc}\hline \text { Scores } & \text { Number of students } \\\hline 50-59 & 2 \\60-69 & 4 \\70-79 & 6 \\80-89 & 15 \\90-99 & 5 \\\hline\end{array}$

The histogram below represents the number of television sets per household for a sample of U.S. households. What is the sample size? Number of Television Sets Per U.S. Household

The Kappa Iota Sigma Fraternity polled its members on the weekend party theme. The vote was as follows: six for toga, four for hayride, eight for luau, and two for masquerade. Display the vote count in a Pareto chart.

Quiz 2: Exploring Data With Tables and Graphs

Analysis of the data from 25 mothers indicates that an infant's birth weight (g) , y , can be estimated by a mother's weight (kg) , x , using the regression equation y=31 x+1501 . If a mother's weight is 70 kg , the infant's birth weight can be estimated as ________ g .

The two key parts of a regression equation involve the ____________ and the y-____________.

The scatterplot below displays the amount of nitrous oxide (NO) explained by the amount of carbon monoxide (CO) emissions in million metric tons over a ten year period in the United States. Select the choice that best describes any relationship between the variables.

Analysis of the data from 25 mothers indicates that an infant's birth weight (g) , y , can be estimated by a mother's weight ( kg) , x , using the regression equation y=31 x+1501 . For every _______ kg increase in a mother's weight, the infant's birth weight increases by _______g.

The histogram below represents the number of television sets per household for a sample of U.S. households. What is the sample size? Number of Television Sets Per U.S. Household

The Kappa Iota Sigma Fraternity polled its members on the weekend party theme. The vote was as follows: six for toga, four for hayride, eight for luau, and two for masquerade. Display the vote count in a Pareto chart.

The two key parts of a regression equation involve the and the y-.

Analysis of the data from 25 mothers indicates that an infant's birth weight (g) , y , can be estimated by a mother's weight ( kg) , x , using the regression equation y=31 x+1501 . For every _ kg increase in a mother's weight, the infant's birth weight increases by _g.