Question 1

If two variables have a strong linear relationship,that means one variable is causing the other variable to go up or down.

Accepted Answer

A) True 
 B)False

Question 2

Compare the spread of the two histograms below.Which of the following is true?

Accepted Answer

A)  Data Set A has a larger spread than Data Set B. 
B)  Data Set A has a smaller spread than Data Set B. 
C)  Data Set A has the same spread as Data Set B. 
D)  You cannot compare the spreads of these histograms without the original data. 
A)  Data Set A has a larger spread than Data Set B. 
B)  Data Set A has a smaller spread than Data Set B. 
C)  Data Set A has the same spread as Data Set B. 
D)  You cannot compare the spreads of these histograms without the original data.

Question 3

According to the stem-and-leaf plot below,this data set is symmetric.
 Stem-and-leaf of P/E ratio; $N = 10$
Loef Unit $= 0.10$

$\begin{array}{c}
\begin{array}{lll}
2\
4 \
(2) \
4 \
3 \
2 \
1
\end{array}
\begin{array}{r}
-1 \
-0 \
-0 \
0 \
0 \
1 \
1
\end{array}
\begin{array}{l}
53 \
97 \
65 \
3\
6\
3\
8 
\end{array}
\end{array}$

Accepted Answer

A) True 
 B)False

Question 4

A(n)____________________ is a table that sorts data into class intervals (categories)and gives the number of observations in each interval (category).

Accepted Answer

frequency

Question 5

A(n)____________________ histogram has two peaks,not necessarily equal in height.

Accepted Answer

The answer of A(n)____________________ histogram has two peaks,not necessarily equal...

Question 6

Which of the following statements describes a line chart?

Accepted Answer

A)  A line chart is a graph of time-series data. 
B)  A line chart is a plot of a variable over time. 
C)  The horizontal axis of a line chart contains time periods. 
D)  All of these choices are true. 
A)  A line chart is a graph of time-series data. 
B)  A line chart is a plot of a variable over time. 
C)  The horizontal axis of a line chart contains time periods. 
D)  All of these choices are true.

Question 7

If we draw a straight line through the points in a scatter diagram and most of the points fall close to the line,there must be a positive relationship between the two variables.

Accepted Answer

A) True 
 B)False

Question 8

Explain the difference between a histogram and a line chart.

Accepted Answer

A histogram is a dis

Question 9

A(n)____________________ display shows the actual observations as well as the number of observations in each class.

Accepted Answer

stem-and-l

Question 10

A professor examines the relationship between minutes studying and exam score (out of 200 points)for a random sample of his students.The scatter diagram is shown below.It appears that study time has somewhat of a positive linear relationship with exam score.

Accepted Answer

A) True 
 B)False

Question 11

What are the two most important characteristics to look for in a scatter diagram?

Accepted Answer

The strength and dir

Question 12

Below are two line charts where the percentage return for a stock is shown over time.The two graphs are made from the same data set.     Explain why these two line charts look different.

Accepted Answer

Their scales on the Y-axis are

Question 13

Which of the following is a characteristic of graphical excellence?

Accepted Answer

A)  Data sets are summarized in tables wherever possible. 
B)  The graph includes no more than one variable,to stress clarity. 
C)  The substance of the data,and not the form of the graph,is stressed. 
D)  All of these choices are true. 
A)  Data sets are summarized in tables wherever possible. 
B)  The graph includes no more than one variable,to stress clarity. 
C)  The substance of the data,and not the form of the graph,is stressed. 
D)  All of these choices are true.

Question 14

When two variables are linearly related,and tend to move in opposite directions,we describe the nature of their association as a negative linear relationship.

Accepted Answer

A) True 
 B)False

Question 15

Slopes and trends in a line chart appear to be steeper if you ____________________ the horizontal (time)axis.

Accepted Answer

The answer of Slopes and trends in a line chart...

Question 16

Is it fair to depict Texas as most tornado prone area of the U.S.by showing it has the highest number of tornados of all states in the U.S.?

Accepted Answer

A)  Yes,because number of tornadoes is the appropriate measure in this situation. 
B)  Yes,because Texas is one of the largest states. 
C)  No,because Texas is larger than almost every other state.Number of square miles should also be taken into account. 
D)  No,because Texas has a very high population,and you need to report tornados per capita. 
A)  Yes,because number of tornadoes is the appropriate measure in this situation. 
B)  Yes,because Texas is one of the largest states. 
C)  No,because Texas is larger than almost every other state.Number of square miles should also be taken into account. 
D)  No,because Texas has a very high population,and you need to report tornados per capita.

Question 17

When a distribution has more values to the left and tails off to the right,it is skewed negatively.

Accepted Answer

A) True 
 B)False

Question 18

The advantage of a stem-and-leaf display over a histogram is that we can see the actual observations.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following statements illustrates graphical deception?

Accepted Answer

A)  Absolute changes,rather than percentage changes are reported. 
B)  To reduce clutter,the scales of the axes are not shown. 
C)  The Y-axis is stretched or shrunk to show the data in their best possible light. 
D)  All of these choices are true. 
A)  Absolute changes,rather than percentage changes are reported. 
B)  To reduce clutter,the scales of the axes are not shown. 
C)  The Y-axis is stretched or shrunk to show the data in their best possible light. 
D)  All of these choices are true.

Question 20

Admission to ER
The following bar chart shows the type of aspirin (if any)given to 100 cardiac patients within 15 minutes of their admission to the emergency room.  
-{Admission to ER Narrative} In what way does the original bar chart distort the data as compared to a bar chart that starts at zero on the Y-axis (frequency axis)?

Accepted Answer

As read from the original bar chart,the

Exam 3: Graphical Descriptive Techniques II

If two variables have a strong linear relationship,that means one variable is causing the other variable to go up or down.

Compare the spread of the two histograms below.Which of the following is true?

According to the stem-and-leaf plot below,this data set is symmetric. Stem-and-leaf of P/E ratio; N=10N = 10N=10 Loef Unit =0.10= 0.10=0.10 2 4 (2) 4 3 2 1 -1 -0 -0 0 0 1 1 53 97 65 3 6 3 8

A(n)____________________ is a table that sorts data into class intervals (categories)and gives the number of observations in each interval (category).

A(n)____________________ histogram has two peaks,not necessarily equal in height.

Which of the following statements describes a line chart?

If we draw a straight line through the points in a scatter diagram and most of the points fall close to the line,there must be a positive relationship between the two variables.

Explain the difference between a histogram and a line chart.

A(n)____________________ display shows the actual observations as well as the number of observations in each class.

A professor examines the relationship between minutes studying and exam score (out of 200 points)for a random sample of his students.The scatter diagram is shown below.It appears that study time has somewhat of a positive linear relationship with exam score.

What are the two most important characteristics to look for in a scatter diagram?

Below are two line charts where the percentage return for a stock is shown over time.The two graphs are made from the same data set. Explain why these two line charts look different.

Which of the following is a characteristic of graphical excellence?

When two variables are linearly related,and tend to move in opposite directions,we describe the nature of their association as a negative linear relationship.

Slopes and trends in a line chart appear to be steeper if you ____________________ the horizontal (time)axis.

Is it fair to depict Texas as most tornado prone area of the U.S.by showing it has the highest number of tornados of all states in the U.S.?

When a distribution has more values to the left and tails off to the right,it is skewed negatively.

The advantage of a stem-and-leaf display over a histogram is that we can see the actual observations.

Which of the following statements illustrates graphical deception?

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

According to the stem-and-leaf plot below,this data set is symmetric. Stem-and-leaf of P/E ratio; $N = 10$ Loef Unit $= 0.10$ 2 4 (2) 4 3 2 1 -1 -0 -0 0 0 1 1 53 97 65 3 6 3 8