Question 1

Graphical excellence is nearly always univariate.

Accepted Answer

A) True 
 B)False

Question 2

Teachers Ages
The ages (in years) of a sample of 25 teachers are as follows:
  
-{Teachers Ages Narrative} Draw a stem-and-leaf display of this data.What is the minimum and maximum age of the teachers in this data set?

Accepted Answer

@#IMG-DLM& The minim

Question 3

Which of the following statements about shapes of histograms is true?

Accepted Answer

A)  A histogram is said to be symmetric if, when we draw a vertical line down the center of the histogram, the two sides are identical in shape and size. 
B)  A negatively skewed histogram is one with a long tail extending to the left. 
C)  A positively skewed histogram is one with a long tail extending to the right. 
D)  All of these choices are true. 
A)  A histogram is said to be symmetric if, when we draw a vertical line down the center of the histogram, the two sides are identical in shape and size. 
B)  A negatively skewed histogram is one with a long tail extending to the left. 
C)  A positively skewed histogram is one with a long tail extending to the right. 
D)  All of these choices are true.

Question 4

Which of the following is the method statisticians use to draw the best fitting straight line through the data on a scatter diagram?

Accepted Answer

A)  The fit best method. 
B)  The least squares method. 
C)  The point-intercept method. 
D)  None of these choices. 
A)  The fit best method. 
B)  The least squares method. 
C)  The point-intercept method. 
D)  None of these choices.

Question 5

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 6

Which of the following statements is true?

Accepted Answer

A)  Graphical techniques should only be used where there is a small amount of data. 
B)  Large data sets are best presented in tabular form. 
C)  Graphical techniques create a visual impression, which is easy to distort. 
D)  All of these choices are true. 
A)  Graphical techniques should only be used where there is a small amount of data. 
B)  Large data sets are best presented in tabular form. 
C)  Graphical techniques create a visual impression, which is easy to distort. 
D)  All of these choices are true.

Question 7

A cumulative relative frequency distribution lists the number of observations that lie below each of the class limits.

Accepted Answer

A) True 
 B)False

Question 8

For what type of data is a histogram appropriate?

Accepted Answer

The answer of For what type of data is a...

Question 9

The line chart below shows tomato prices each month from January (month 1) to December last year ($ per pound).By looking at this chart you can see the lowest tomato prices occurred in July.

Accepted Answer

A) True 
 B)False

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

One of the variables used to help predict unemployment rates is the rate of inflation.Accordingly, we identify rate of inflation as the ____________________ variable, and unemployment rate as the ____________________ variable.

Accepted Answer

independen

Question 12

The two most important characteristics to look for in a scatter diagram are the ____________________ and ____________________ of the linear relationship.

Accepted Answer

strength;

Question 13

According to the stem-and-leaf plot below, the median quiz score for this data set is 8.

Accepted Answer

A) True 
 B)False

Question 14

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 15

The sum of relative frequencies in a distribution always equals 1.

Accepted Answer

A) True 
 B)False

Question 16

The original observations cannot be determined once they are grouped into a frequency distribution.

Accepted Answer

A) True 
 B)False

Question 17

Electronics Company
At a meeting of regional offices managers of a national electronics company, a survey was taken to determine the number of employees the regional managers supervise in the operation of their departments.The results of the survey are shown below.
  
-{Electronics Company Narrative} How many regional offices are represented in the survey results?

Accepted Answer

7 + 11 + 1

Question 18

Graphical techniques should not be used to present data if accurate tabular forms for the same data are available.

Accepted Answer

A) True 
 B)False

Question 19

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} Which histogram makes the differences in the house calls appear to be the most dramatic?

Accepted Answer

Histogram 2 makes differences

Question 20

The relative frequency of a class in a histogram is computed by

Accepted Answer

A)  dividing the frequency of the class by the number of classes. 
B)  dividing the frequency of the class by the class width. 
C)  dividing the frequency of the class by the total of all frequencies. 
D)  None of these choices. 
A)  dividing the frequency of the class by the number of classes. 
B)  dividing the frequency of the class by the class width. 
C)  dividing the frequency of the class by the total of all frequencies. 
D)  None of these choices.

Graphical excellence is nearly always univariate.

Teachers Ages The ages (in years) of a sample of 25 teachers are as follows: -{Teachers Ages Narrative} Draw a stem-and-leaf display of this data.What is the minimum and maximum age of the teachers in this data set?

Which of the following statements about shapes of histograms is true?

Which of the following is the method statisticians use to draw the best fitting straight line through the data on a scatter diagram?

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.?

Which of the following statements is true?

A cumulative relative frequency distribution lists the number of observations that lie below each of the class limits.

For what type of data is a histogram appropriate?

The line chart below shows tomato prices each month from January (month 1) to December last year ($ per pound).By looking at this chart you can see the lowest tomato prices occurred in July.

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.

One of the variables used to help predict unemployment rates is the rate of inflation.Accordingly, we identify rate of inflation as the variable, and unemployment rate as the variable.

The two most important characteristics to look for in a scatter diagram are the and of the linear relationship.

According to the stem-and-leaf plot below, the median quiz score for this data set is 8.

What values are displayed on a cumulative relative frequency distribution?

The sum of relative frequencies in a distribution always equals 1.

The original observations cannot be determined once they are grouped into a frequency distribution.

Graphical techniques should not be used to present data if accurate tabular forms for the same data are available.

The relative frequency of a class in a histogram is computed by

What Is Statistics

Graphical Descriptive Techniques I

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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

Simple Linear Regression and Correlation

Multiple Regression

Filters

Exam 3: Graphical Descriptive Techniques II

Graphical excellence is nearly always univariate.

Teachers Ages The ages (in years) of a sample of 25 teachers are as follows: -{Teachers Ages Narrative} Draw a stem-and-leaf display of this data.What is the minimum and maximum age of the teachers in this data set?

Which of the following statements about shapes of histograms is true?

Which of the following is the method statisticians use to draw the best fitting straight line through the data on a scatter diagram?

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.?

Which of the following statements is true?

A cumulative relative frequency distribution lists the number of observations that lie below each of the class limits.

For what type of data is a histogram appropriate?

The line chart below shows tomato prices each month from January (month 1) to December last year ($ per pound).By looking at this chart you can see the lowest tomato prices occurred in July.

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.

One of the variables used to help predict unemployment rates is the rate of inflation.Accordingly, we identify rate of inflation as the ____________________ variable, and unemployment rate as the ____________________ variable.

The two most important characteristics to look for in a scatter diagram are the ____________________ and ____________________ of the linear relationship.

According to the stem-and-leaf plot below, the median quiz score for this data set is 8.

What values are displayed on a cumulative relative frequency distribution?

The sum of relative frequencies in a distribution always equals 1.

The original observations cannot be determined once they are grouped into a frequency distribution.

Graphical techniques should not be used to present data if accurate tabular forms for the same data are available.

The relative frequency of a class in a histogram is computed by

What Is Statistics

Graphical Descriptive Techniques I

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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

Simple Linear Regression and Correlation

Multiple Regression

Filters

One of the variables used to help predict unemployment rates is the rate of inflation.Accordingly, we identify rate of inflation as the variable, and unemployment rate as the variable.

The two most important characteristics to look for in a scatter diagram are the and of the linear relationship.