Question 1

The percent frequency of a class is computed by

Accepted Answer

A)  multiplying the relative frequency by 10. 
B)  dividing the relative frequency by 100. 
C)  multiplying the relative frequency by 100. 
D)  adding 100 to the relative frequency. 
A)  multiplying the relative frequency by 10. 
B)  dividing the relative frequency by 100. 
C)  multiplying the relative frequency by 100. 
D)  adding 100 to the relative frequency. C

Question 2

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a​

Accepted Answer

A)  ​relative frequency distribution. 
B)  ​pie chart. 
C)  ​stem-and-leaf display. 
D)  ​dot plot. 
A)  ​relative frequency distribution. 
B)  ​pie chart. 
C)  ​stem-and-leaf display. 
D)  ​dot plot. C

Question 3

The grades of 10 students in their first management test are shown below. $$\begin{array} { l l l l l } 
94 & 61 & 96 & 66 & 92 \
68 & 75 & 85 & 84 & 78
\end{array}$$ ​ 
a.
Construct a frequency distribution. Let the first class be 60 - 69.
b.
Construct a cumulative frequency distribution.
c.
Construct a relative frequency distribution.

Accepted Answer

$\begin{array}{llcl}
&a.&b.&c.\
&& \text{ Relative }  & \text { Cumulative }\
\text { Class } & \text { Frequency } & \text { Frequency } & \text { Frequency } \
60-69 & 3 & 3 & 0.3 \
70-79 & 2 & 5 & 0.2 \
80-89 & 2 & 7 & 0.2 \
90-99 & \underline{3} & 10 & \underline{0.3}\
Total & 10&&1.0
\end{array}$

Question 4

A sample of 15 children shows their favorite restaurants:   $$\begin{array} { l l l } 
\text { McDonalds } & \text { Luppi's } & \text { Mellow Mushroom } \
\text { Friday's } & \text { McDonalds } & \text { McDonalds } \
\text { Pizza Hut } & \text { Taco Bell } & \text { McDonalds } \
\text { Mellow Mushroom } & \text { Luppi's } & \text { Fizza Hut } \
\text { McDonalds } & \text { Friday's } & \text { McDonalds }
\end{array}$$ 
Which of the following is the correct relative frequency for McDonalds?

Accepted Answer

A)  .27 
B)  .5 
C)  .4 
D)  .6 
A)  .27 
B)  .5 
C)  .4 
D)  .6

Question 5

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

Accepted Answer

A)  one. 
B)  100. 
C)  the total number of elements in the data set. 
D)  None of these alternatives is correct. 
A)  one. 
B)  100. 
C)  the total number of elements in the data set. 
D)  None of these alternatives is correct.

Question 6

​Histograms based on data on housing prices and salaries typically are

Accepted Answer

A)  ​skewed to the left. 
B)  ​skewed to the right. 
C)  ​stacked. 
D)  ​symmetric. 
A)  ​skewed to the left. 
B)  ​skewed to the right. 
C)  ​stacked. 
D)  ​symmetric.

Question 7

For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exists between x and y. $$\begin{array} { l l } 
\mathbf { x } & \mathbf { y } \
2 & 7 \
6 & 19 \
3 & 9 \
5 & 17 \
4 & 11
\end{array}$$

Accepted Answer

A positive relations

Question 8

A survey of 400 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. $\begin{array}{l|lcl|l}
&&\text { Undergraduate Major }\
\text { Graduate School } & \text { Business } & \text { Engineering } & \text { Others } & \text { Total } \
\hline \text { Yes } & 35 & 42 & 63 & 140 \
\text { No } & 91 & 104 & 65 & 260 \
\hline \text { Total } & 126 & 146 & 128 & 400
\end{array}$ ​ 
a.Are a majority of the seniors in the survey planning to attend graduate school?
b.Which discipline constitutes the majority of the individuals in the survey?
c.Compute row percentages and comment on the relationship between the students' undergraduate major and their intention of attending graduate school.
d.Compute the column percentages and comment on the relationship between the students' intention of going to graduate school and their undergraduate major.

Accepted Answer

a.No, majority (260) will not attend gra

Question 9

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should​

Accepted Answer

A)  ​investigate whether any hidden variables could affect the conclusions. 
B)  ​construct a scatter diagram and find the trendline. 
C)  ​develop a relative frequency distribution. 
D)  ​construct a dot plot and look for significant gaps. 
A)  ​investigate whether any hidden variables could affect the conclusions. 
B)  ​construct a scatter diagram and find the trendline. 
C)  ​develop a relative frequency distribution. 
D)  ​construct a dot plot and look for significant gaps.

Question 10

The relative frequency of a class is computed by

Accepted Answer

A)  dividing the cumulative frequency of the class by n. 
B)  dividing n by cumulative frequency of the class. 
C)  dividing the frequency of the class by n. 
D)  dividing the frequency of the class by the number of classes. 
A)  dividing the cumulative frequency of the class by n. 
B)  dividing n by cumulative frequency of the class. 
C)  dividing the frequency of the class by n. 
D)  dividing the frequency of the class by the number of classes.

Question 11

The sum of the relative frequencies for all classes will always equal

Accepted Answer

A)  the sample size. 
B)  the number of classes. 
C)  one. 
D)  any value larger than one. 
A)  the sample size. 
B)  the number of classes. 
C)  one. 
D)  any value larger than one.

Question 12

When the conclusions based upon the unaggregated data can be completely reversed if we look at the aggregated crosstabulation, the occurrence is known as

Accepted Answer

A)  ​Reverse correlation. 
B)  ​Negative correlation​. 
C)  ​Simpson's paradox. 
D)  ​Pareto's rule. 
A)  ​Reverse correlation. 
B)  ​Negative correlation​. 
C)  ​Simpson's paradox. 
D)  ​Pareto's rule.

Question 13

Construct a stem-and-leaf display for the following data. $$\begin{array} { l l l l l l l l l l } 
12 & 52 & 51 & 37 & 47 & 40 & 38 & 26 & 57 & 31 \
49 & 43 & 45 & 19 & 36 & 32 & 44 & 48 & 22 & 18
\end{array}$$

Accepted Answer

The answer of Construct a stem-and-leaf display for the following...

Question 14

A display used to compare the frequency, relative frequency or percent frequency of two categorical variables is a​

Accepted Answer

A)  scatter diagram. 
B)  ​stacked bar chart. 
C)  ​pie chart. 
D)  ​stem-and-leaf display. 
A)  scatter diagram. 
B)  ​stacked bar chart. 
C)  ​pie chart. 
D)  ​stem-and-leaf display.

Question 15

The sales records of a real estate company for the month of May shows the following house prices (rounded to the nearest $1,000).Values are in thousands of dollars. $$\begin{array} { l l l l l } 
105 & 55 & 45 & 85 & 75 \
30 & 60 & 75 & 79 & 95
\end{array}$$ ​ 
a.Develop a frequency distribution and a percent frequency distribution for the house prices. (Use 5 classes and have your first class be 20 - 39.)
b.Develop a cumulative frequency and a cumulative percent frequency distribution for the above data.
c.What percentage of the houses are sold at a price below $80,000?

Accepted Answer

The answer of The sales records of a real estate...

Question 16

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

Accepted Answer

A)  frequency distribution. 
B)  relative frequency distribution. 
C)  cumulative relative frequency distribution. 
D)  cumulative frequency distribution. 
A)  frequency distribution. 
B)  relative frequency distribution. 
C)  cumulative relative frequency distribution. 
D)  cumulative frequency distribution.

Question 17

Thirty students in the School of Business were asked what their majors were.The following represents their responses (M = Management; A = Accounting; E = Economics; O = Others). $$\begin{array} { l l l l l l l l l l } 
\mathrm { A } & \mathrm { M } & \mathrm { M } & \mathrm { A } & \mathrm { M } & \mathrm { M } & \mathrm { E } & \mathrm { M } & \mathrm { O } & \mathrm { A } \
\mathrm { E } & \mathrm { E } & \mathrm { M } & \mathrm { A } & \mathrm { O } & \mathrm { E } & \mathrm { M } & \mathrm { A } & \mathrm { M } & \mathrm { A } \
\mathrm { M } & \mathrm { A } & \mathrm { O } & \mathrm { A } & \mathrm { M } & \mathrm { E } & \mathrm { E } & \mathrm { M } & \mathrm { A } & \mathrm { M }
\end{array}$$ ​ 
a.
Construct a frequency distribution and a bar chart.
b.
Construct a relative frequency distribution and a pie chart.

Accepted Answer

The answer of Thirty students in the School of Business...

Question 18

A sample of 15 children shows their favorite restaurants:   $$\begin{array} { l l l } 
\text { McDonalds } & \text { Luppi's } & \text { Mellow Mushroom } \
\text { Friday's } & \text { McDonalds } & \text { McDonalds } \
\text { Pizza Hut } & \text { Taco Bell } & \text { McDonalds } \
\text { Mellow Mushroom } & \text { Luppi's } & \text { Fizza Hut } \
\text { McDonalds } & \text { Friday's } & \text { McDonalds }
\end{array}$$  
Which of the following displays is most appropriate for this data?

Accepted Answer

A)  Side-by-side bar chart 
B)  Histogram 
C)  Stacked bar chart 
D)  Pie chart 
A)  Side-by-side bar chart 
B)  Histogram 
C)  Stacked bar chart 
D)  Pie chart

Question 19

Five hundred recent graduates indicated their majors as follows: $$\begin{array} { l l } 
\text { Major } & \text { Frequency } \
\text { Accounting } & 60 \
\text { Finance } & 100 \
\text { Economics } & 40 \
\text { Management } & 120 \
\text { Marketing } & 80 \
\text { Engineering } & 60 \
\text { Computer Science } &40 \
\text { Total } &500
\end{array}$$ ​ 
a.
Construct a relative frequency distribution.
b.
Construct a percent frequency distribution.

Accepted Answer

The answer of Five hundred recent graduates indicated their majors...

Question 20

​The approximate class width for a frequency distribution involving quantitative data can be determined using the expression

Accepted Answer

A)  ​mean frequency/total frequency. 
B)  ​total frequency/class midpoint. 
C)  ​range/desired number of classes. 
D)  ​desired number of classes/class midpoint. 
A)  ​mean frequency/total frequency. 
B)  ​total frequency/class midpoint. 
C)  ​range/desired number of classes. 
D)  ​desired number of classes/class midpoint.

The percent frequency of a class is computed by

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a

The grades of 10 students in their first management test are shown below. 94 61 96 66 92 68 75 85 84 78 a. Construct a frequency distribution. Let the first class be 60 - 69. b. Construct a cumulative frequency distribution. c. Construct a relative frequency distribution.

A sample of 15 children shows their favorite restaurants: McDonalds Luppi's Mellow Mushroom Friday's McDonalds McDonalds Pizza Hut Taco Bell McDonalds Mellow Mushroom Luppi's Fizza Hut McDonalds Friday's McDonalds Which of the following is the correct relative frequency for McDonalds?

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

Histograms based on data on housing prices and salaries typically are

For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exists between x and y. 2 7 6 19 3 9 5 17 4 11

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should

The relative frequency of a class is computed by

The sum of the relative frequencies for all classes will always equal

When the conclusions based upon the unaggregated data can be completely reversed if we look at the aggregated crosstabulation, the occurrence is known as

Construct a stem-and-leaf display for the following data. 12 52 51 37 47 40 38 26 57 31 49 43 45 19 36 32 44 48 22 18

A display used to compare the frequency, relative frequency or percent frequency of two categorical variables is a

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

Thirty students in the School of Business were asked what their majors were.The following represents their responses (M = Management; A = Accounting; E = Economics; O = Others). a. Construct a frequency distribution and a bar chart. b. Construct a relative frequency distribution and a pie chart.

A sample of 15 children shows their favorite restaurants: McDonalds Luppi's Mellow Mushroom Friday's McDonalds McDonalds Pizza Hut Taco Bell McDonalds Mellow Mushroom Luppi's Fizza Hut McDonalds Friday's McDonalds Which of the following displays is most appropriate for this data?

Five hundred recent graduates indicated their majors as follows: Major Frequency Accounting 60 Finance 100 Economics 40 Management 120 Marketing 80 Engineering 60 Computer Science 40 Total 500 a. Construct a relative frequency distribution. b. Construct a percent frequency distribution.

The approximate class width for a frequency distribution involving quantitative data can be determined using the expression

Data and Statistics

Descriptive Statistics: Numerical

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 2: Descriptive Statistics: Tabulargraphical

The percent frequency of a class is computed by

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a​

The grades of 10 students in their first management test are shown below. 94 61 96 66 92 68 75 85 84 78 ​ a. Construct a frequency distribution. Let the first class be 60 - 69. b. Construct a cumulative frequency distribution. c. Construct a relative frequency distribution.

A sample of 15 children shows their favorite restaurants: McDonalds Luppi's Mellow Mushroom Friday's McDonalds McDonalds Pizza Hut Taco Bell McDonalds Mellow Mushroom Luppi's Fizza Hut McDonalds Friday's McDonalds Which of the following is the correct relative frequency for McDonalds?

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

​Histograms based on data on housing prices and salaries typically are

For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exists between x and y. 2 7 6 19 3 9 5 17 4 11

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should​

The relative frequency of a class is computed by

The sum of the relative frequencies for all classes will always equal

When the conclusions based upon the unaggregated data can be completely reversed if we look at the aggregated crosstabulation, the occurrence is known as

Construct a stem-and-leaf display for the following data. 12 52 51 37 47 40 38 26 57 31 49 43 45 19 36 32 44 48 22 18

A display used to compare the frequency, relative frequency or percent frequency of two categorical variables is a​

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

A sample of 15 children shows their favorite restaurants: McDonalds Luppi's Mellow Mushroom Friday's McDonalds McDonalds Pizza Hut Taco Bell McDonalds Mellow Mushroom Luppi's Fizza Hut McDonalds Friday's McDonalds Which of the following displays is most appropriate for this data?

Five hundred recent graduates indicated their majors as follows: Major Frequency Accounting 60 Finance 100 Economics 40 Management 120 Marketing 80 Engineering 60 Computer Science 40 Total 500 ​ a. Construct a relative frequency distribution. b. Construct a percent frequency distribution.

​The approximate class width for a frequency distribution involving quantitative data can be determined using the expression

Data and Statistics

Descriptive Statistics: Numerical

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a

The grades of 10 students in their first management test are shown below. 94 61 96 66 92 68 75 85 84 78 a. Construct a frequency distribution. Let the first class be 60 - 69. b. Construct a cumulative frequency distribution. c. Construct a relative frequency distribution.

Histograms based on data on housing prices and salaries typically are

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should

A display used to compare the frequency, relative frequency or percent frequency of two categorical variables is a

Five hundred recent graduates indicated their majors as follows: Major Frequency Accounting 60 Finance 100 Economics 40 Management 120 Marketing 80 Engineering 60 Computer Science 40 Total 500 a. Construct a relative frequency distribution. b. Construct a percent frequency distribution.

The approximate class width for a frequency distribution involving quantitative data can be determined using the expression