Question 1

____________________ techniques give you the big picture of a distribution and ____________________ techniques give you more precise details.

Accepted Answer

Graphical;numerical

Question 2

What statistics and graphs can you use to answer the following question: Are the observations close to one another,or are they widely dispersed?

Accepted Answer

The standard deviation can tell you whether the observations are close to or spread out from the middle.The interquartile range tells how far apart them middle 50% of the data are,and works especially well for skewed data.A histogram and a box plot can show you how close together/spread out the data appear visually.

Question 3

What statistics and graphs can you use to answer the following question: Is the distribution symmetric? If not,is it skewed? If symmetric,is it bell shaped?

Accepted Answer

A histogram can show you whether a distribution is symmetric,positively skewed,negatively skewed,or has a different shape.If the data is symmetric,a histogram can tell you whether the data is bell shaped,bimodal,or uniform,etc.A box plot can also show you whether a distribution is symmetric,negatively skewed or positively skewed.However,it can't tell you what the exact shape is,if the data are found to be symmetric.For example,a box plot cannot tell you whether a symmetric data set is unimodal or bimodal.This is a drawback of a box plot.

Question 4

What statistics and graphs can you use to answer the following question: Where is the approximate center of the distribution?

Accepted Answer

The median is a better measure of center

Question 5

The precision provided by the numerical techniques (mean,median,and standard deviation)provides more useful information than graphical techniques (histograms and box plots)alone.

Accepted Answer

A) True 
 B)False

Question 6

A scatter diagram reveals a strong positive linear relationship between oil and gasoline prices.Which of the following numerical techniques will not give us more detailed information about this relationship?

Accepted Answer

A)  Coefficient of determination 
B)  Coefficient of correlation 
C)  Coefficient of variation. 
D)  All of these choices help us describe this relationship. 
A)  Coefficient of determination 
B)  Coefficient of correlation 
C)  Coefficient of variation. 
D)  All of these choices help us describe this relationship.

Question 7

Which of the following is correct about the shape of a distribution?

Accepted Answer

A)  The shape can show you how many modes there are. 
B)  The shape can help you determine the approximate center of the distribution. 
C)  The shape can help you determine whether the data are close or spread out. 
D)  All of these choices are true. 
A)  The shape can show you how many modes there are. 
B)  The shape can help you determine the approximate center of the distribution. 
C)  The shape can help you determine whether the data are close or spread out. 
D)  All of these choices are true.

Question 8

What statistics and graphs can you use to look for a relationship between two interval variables?

Accepted Answer

Scatter diagrams,covariance,th

Question 9

The shape of a distribution helps answer which question about the data?

Accepted Answer

A)  Where is the approximate center of the distribution? 
B)  Are the observations close to one another,or are they widely dispersed? 
C)  Is the distribution symmetric? 
D)  All of these choices are true. 
A)  Where is the approximate center of the distribution? 
B)  Are the observations close to one another,or are they widely dispersed? 
C)  Is the distribution symmetric? 
D)  All of these choices are true.

Question 10

Which of the following characteristics does a histogram help you identify?

Accepted Answer

A)  The shape of distribution. 
B)  The approximate center of a distribution. 
C)  The amount of spread in a distribution. 
D)  All of these choices are true. 
A)  The shape of distribution. 
B)  The approximate center of a distribution. 
C)  The amount of spread in a distribution. 
D)  All of these choices are true.

Question 11

Scatter diagrams,covariance,and the coefficient of correlation are useful techniques for detecting relationships between two ____________________ variables.

Accepted Answer

The answer of Scatter diagrams,covariance,and the coefficient of correlation are...

Question 12

Graphical and numerical techniques,such as histograms and least squares lines provide identical information.

Accepted Answer

A) True 
 B)False

Question 13

We can frequently make several inferences about the nature of the data from the ____________________ of its histogram.

Accepted Answer

The answer of We can frequently make several inferences about...

Question 14

Statisticians typically apply graphical techniques as a first step in a data analysis because we first need to know the shape of the distribution.

Accepted Answer

A) True 
 B)False

Question 15

Statisticians usually apply graphical techniques as a first step in analyzing data because we first need to know the ____________________ of the distribution.

Accepted Answer

The answer of Statisticians usually apply graphical techniques as a...

Question 16

What statistics and graphs can you use to answer the following questions: Is the distribution unimodal,bimodal,or multimodal? If there is more than one mode,where are the peaks,and where are the valleys?

Accepted Answer

A histogram can show you the number of m

Question 17

Box plots and medians work well to describe ____________________ data,while histograms and means work well to describe ____________________ data.

Accepted Answer

The answer of Box plots and medians work well to...

Question 18

The coefficient of correlation and the least squares line both describe the relationship between two interval variables.

Accepted Answer

A) True 
 B)False

Exam 4: C: Numerical Descriptive Techniques

____________________ techniques give you the big picture of a distribution and ____________________ techniques give you more precise details.

What statistics and graphs can you use to answer the following question: Are the observations close to one another,or are they widely dispersed?

What statistics and graphs can you use to answer the following question: Is the distribution symmetric? If not,is it skewed? If symmetric,is it bell shaped?

What statistics and graphs can you use to answer the following question: Where is the approximate center of the distribution?

The precision provided by the numerical techniques (mean,median,and standard deviation)provides more useful information than graphical techniques (histograms and box plots)alone.

A scatter diagram reveals a strong positive linear relationship between oil and gasoline prices.Which of the following numerical techniques will not give us more detailed information about this relationship?

Which of the following is correct about the shape of a distribution?

What statistics and graphs can you use to look for a relationship between two interval variables?

The shape of a distribution helps answer which question about the data?

Which of the following characteristics does a histogram help you identify?

Scatter diagrams,covariance,and the coefficient of correlation are useful techniques for detecting relationships between two ____________________ variables.

Graphical and numerical techniques,such as histograms and least squares lines provide identical information.

We can frequently make several inferences about the nature of the data from the ____________________ of its histogram.

Statisticians typically apply graphical techniques as a first step in a data analysis because we first need to know the shape of the distribution.

Statisticians usually apply graphical techniques as a first step in analyzing data because we first need to know the ____________________ of the distribution.

What statistics and graphs can you use to answer the following questions: Is the distribution unimodal,bimodal,or multimodal? If there is more than one mode,where are the peaks,and where are the valleys?

Box plots and medians work well to describe ____________________ data,while histograms and means work well to describe ____________________ data.

The coefficient of correlation and the least squares line both describe the relationship between two interval variables.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

A: Numerical Descriptive Techniques

B: 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

techniques give you the big picture of a distribution and techniques give you more precise details.

Box plots and medians work well to describe data,while histograms and means work well to describe data.