Question 1

Which of the following characteristics apply to achieve graphical excellence?

Accepted Answer

A)  The graph encourages the viewer to compare two or more variables. 
B)  The display induces the viewer to address the substance of the data and not the form of the graph. 
C)  There is no distortion of what the data reveal. 
D)  All of these choices are true. 
A)  The graph encourages the viewer to compare two or more variables. 
B)  The display induces the viewer to address the substance of the data and not the form of the graph. 
C)  There is no distortion of what the data reveal. 
D)  All of these choices are true.

Question 2

A line chart is created by plotting the value of the variable on the ____________________ axis and the time periods on the ____________________ axis.

Accepted Answer

vertical;h

Question 3

The line chart below shows cucumber prices fluctuated from $2.00 per pound to over $4.50 per pound during the year.

Accepted Answer

A) True 
 B)False

Question 4

The intervals (classes)in a histogram are equally wide.

Accepted Answer

A) True 
 B)False

Question 5

A(n)____________________ is a graphical representation of the cumulative relative frequencies.

Accepted Answer

The answer of A(n)____________________ is a graphical representation of the...

Question 6

Test scores
The scores on a calculus test for a random sample of 40 students are as follows:
 $$\begin{array} { l l l l l l l l l l } 
63 & 74 & 42 & 65 & 51 & 54 & 36 & 56 & 68 & 57 \
62 & 64 & 76 & 67 & 79 & 61 & 81 & 77 & 59 & 38 \
84 & 68 & 71 & 94 & 71 & 86 & 69 & 75 & 91 & 55 \
48 & 82 & 83 & 54 & 79 & 62 & 68 & 58 & 41 & 47
\end{array}$$
-{Test Grades Narrative} Construct a cumulative frequency and a cumulative relative frequency distribution for this data.What proportion of the exam scores are less than 60? What proportion of the exam scores are 70 or more?

Accepted Answer

\[\begin{array} { | c | c | c | } 
\hlin

Question 7

Internet Classes
A survey of 25 students was conducted to determine how they rate the quality of Internet classes.Students were asked to rate the overall quality from 0 (no quality at all)to 100 (extremely good quality).The stem-and-leaf display of the data is shown below.
 $$\begin{array} { c | l } 
\text { Stem } & \text { Leaves } \
\hline 3 & 15 \
4 & 01457889 \
5 & 0134677 \
6 & 24568 \
7 & 29 \
8 & \
9 & 5
\end{array}$$
-{Internet Classes Narrative} What percentage of the students rated the overall quality of Internet classes as being 70 or above?

Accepted Answer

The answer of Internet Classes
A survey of 25 students was...

Question 8

A stem-and-leaf display represents nominal data.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following statements is false?

Accepted Answer

A)  You can examine the relationship between two nominal variables using a cross-classification table. 
B)  You can only apply statistical techniques to one variable at a time. 
C)  You can examine the relationship between two interval variables using a scatter diagram. 
D)  None of these choices. 
A)  You can examine the relationship between two nominal variables using a cross-classification table. 
B)  You can only apply statistical techniques to one variable at a time. 
C)  You can examine the relationship between two interval variables using a scatter diagram. 
D)  None of these choices.

Question 10

In order to draw a scatter diagram,we need interval data for

Accepted Answer

A)  one variable 
B)  two variables 
C)  three variables 
D)  four variables 
A)  one variable 
B)  two variables 
C)  three variables 
D)  four variables

Question 11

Home Care
Data are collected on the number of house calls (x)made in a given week by each of 60 nurses in a certain hospital.The same data set is displayed in each of the three histograms below.      
-{Home Care Narrative} How many nurses are there in this hospital?

Accepted Answer

60;you get this number by adding up all

Question 12

Which of the following describes the shape of the histogram below?

Accepted Answer

A)  Positively skewed 
B)  Negatively skewed 
C)  Symmetric 
D)  None of these choices 
A)  Positively skewed 
B)  Negatively skewed 
C)  Symmetric 
D)  None of these choices

Question 13

Time series data are often graphically depicted on a(n)____________________,which is a plot of the variable of interest over time.

Accepted Answer

The answer of Time series data are often graphically depicted...

Question 14

A graph showing trends over time is called a(n)____________________ chart.

Accepted Answer

The answer of A graph showing trends over time is...

Question 15

Possible methods of creating distorted impressions with bar charts include:

Accepted Answer

A)  Stretching the vertical axis. 
B)  Shrinking the horizontal axis. 
C)  Constructing the bars so that their widths are proportional to their heights. 
D)  All of these choices are true. 
A)  Stretching the vertical axis. 
B)  Shrinking the horizontal axis. 
C)  Constructing the bars so that their widths are proportional to their heights. 
D)  All of these choices are true.

Question 16

The number of class intervals in a histogram depends on the number of observations in the data set.

Accepted Answer

A) True 
 B)False

Question 17

What values are displayed on a cumulative relative frequency distribution?

Accepted Answer

A)  The number of observations that fall into each class interval. 
B)  The proportion of observations that fall into each class interval. 
C)  The number of observations that fall below each class interval. 
D)  The proportion of observations that fall below each class interval. 
A)  The number of observations that fall into each class interval. 
B)  The proportion of observations that fall into each class interval. 
C)  The number of observations that fall below each class interval. 
D)  The proportion of observations that fall below each class interval.

Question 18

When two variables tend to move in opposite directions,yet still form a linear pattern,how do you describe their relationship?

Accepted Answer

A)  A positive linear relationship. 
B)  A negative linear relationship. 
C)  A proportional inverse relationship. 
D)  None of these choices. 
A)  A positive linear relationship. 
B)  A negative linear relationship. 
C)  A proportional inverse relationship. 
D)  None of these choices.

Question 19

A modal class is the class with the largest number of observations.

Accepted Answer

A) True 
 B)False

Question 20

Differences in the frequencies of a histogram appear to be more dramatic if you ____________________ the vertical axis.

Accepted Answer

The answer of Differences in the frequencies of a histogram...

Exam 3: Graphical Descriptive Techniques II

Which of the following characteristics apply to achieve graphical excellence?

A line chart is created by plotting the value of the variable on the ____________________ axis and the time periods on the ____________________ axis.

The line chart below shows cucumber prices fluctuated from $2.00 per pound to over $4.50 per pound during the year.

The intervals (classes)in a histogram are equally wide.

A(n)____________________ is a graphical representation of the cumulative relative frequencies.

A stem-and-leaf display represents nominal data.

Which of the following statements is false?

In order to draw a scatter diagram,we need interval data for

Home Care Data are collected on the number of house calls (x)made in a given week by each of 60 nurses in a certain hospital.The same data set is displayed in each of the three histograms below. -{Home Care Narrative} How many nurses are there in this hospital?

Which of the following describes the shape of the histogram below?

Time series data are often graphically depicted on a(n)____________________,which is a plot of the variable of interest over time.

A graph showing trends over time is called a(n)____________________ chart.

Possible methods of creating distorted impressions with bar charts include:

The number of class intervals in a histogram depends on the number of observations in the data set.

What values are displayed on a cumulative relative frequency distribution?

When two variables tend to move in opposite directions,yet still form a linear pattern,how do you describe their relationship?

A modal class is the class with the largest number of observations.

Differences in the frequencies of a histogram appear to be more dramatic if you ____________________ the vertical axis.

What Is Statistics

Graphical Descriptive Techniques I

A: Numerical Descriptive Techniques

B: Numerical Descriptive Techniques

C: Numerical Descriptive Techniques

Data Collection and Sampling

Probability

A: Random Variables and Discrete Probability Distributions

B: Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

A: Simple Linear Regression and Correlation

B: Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analysis and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

A line chart is created by plotting the value of the variable on the axis and the time periods on the axis.