Question 1

Stem-and-leaf displays and dot plots are useful for detecting outliers.

Accepted Answer

A) True 
 B)False

Question 2

Beginning the vertical scale of a graph at a value different from zero can cause increases to look more dramatic.

Accepted Answer

A) True 
 B)False

Question 3

A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph.   What is the approximate shape of the distribution of the data?

Accepted Answer

A) Normal 
B) Skewed to the right 
C) Skewed to the left 
D) Bimodal 
E) Uniform 
A) Normal 
B) Skewed to the right 
C) Skewed to the left 
D) Bimodal 
E) Uniform

Question 4

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50
How many classes should be used in the construction of a histogram?

Accepted Answer

A) 4 
B) 6 
C) 10 
D) 5 
E) 2 
A) 4 
B) 6 
C) 10 
D) 5 
E) 2

Question 5

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months.Construct a dot plot of these data and describe the distribution.
5,1,4,8,0,6,3,5,3,4,7,15,5,8,2,1,5,4

Accepted Answer

@#IMG-DLM& Data are skewed to

Question 6

An observation separated from the rest of the data is a(n)___________.

Accepted Answer

A) Absolute extreme 
B) Outlier 
C) Mode 
D) Quartile 
A) Absolute extreme 
B) Outlier 
C) Mode 
D) Quartile

Question 7

Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide.They obtained the following results.   Construct a table of row percentages.

Accepted Answer

The answer of Recently an advertising company called 200 people...

Question 8

When grouping a large sample of measurements into classes,the ______________ is a better tool than the ___________.

Accepted Answer

A) Histogram,stem-and-leaf display 
B) Box plot,histogram 
C) Stem-and-leaf display,scatter plot 
D) Scatter plot,box plot 
A) Histogram,stem-and-leaf display 
B) Box plot,histogram 
C) Stem-and-leaf display,scatter plot 
D) Scatter plot,box plot

Question 9

The sample cumulative distribution function is nondecreasing.

Accepted Answer

A) True 
 B)False

Question 10

When we wish to summarize the proportion (or fraction)of items in a class,we use the frequency distribution for each class.

Accepted Answer

A) True 
 B)False

Question 11

It is possible to create different interpretations of the same graphical display by simply using different captions.

Accepted Answer

A) True 
 B)False

Question 12

The number of items rejected daily by a manufacturer because of defects for the last 30 days are:
20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8
Complete this frequency table for these data

Accepted Answer

The answer of The number of items rejected daily by...

Question 13

A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph.   What would be the first class interval for the frequency histogram?

Accepted Answer

A) 5.2-6.5 
B) 5.2-6.0 
C) 5.0-6.0 
D) 5.2-6.6 
E) 5.2-6.4 
A) 5.2-6.5 
B) 5.2-6.0 
C) 5.0-6.0 
D) 5.2-6.6 
E) 5.2-6.4

Question 14

Leaves on a stem-and-leaf display should be rearranged so that they are in increasing order from left to right.

Accepted Answer

A) True 
 B)False

Question 15

At the end of their final exam,550 students answered an additional question in which they rated the teaching effectiveness of their instructor,with the following results.   What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

Accepted Answer

A) 0.345 
B) 0.254 
C) 0.482 
D) 0.898 
E) 0.644 
A) 0.345 
B) 0.254 
C) 0.482 
D) 0.898 
E) 0.644

Question 16

The stem-and-leaf display is advantageous because it allows us to actually see the measurements in the data set.

Accepted Answer

A) True 
 B)False

Question 17

A plot of the values of two variables is a _____ plot.

Accepted Answer

A) Runs 
B) Scatter 
C) Dot 
D) Ogive 
A) Runs 
B) Scatter 
C) Dot 
D) Ogive

Question 18

When establishing the classes for a frequency table,it is generally agreed that the more classes you use,the better your frequency table will be.

Accepted Answer

A) True 
 B)False

Question 19

Consider the following data.   Create a stem-and-leaf display for the sample.

Accepted Answer

Stem-and-l

Question 20

When looking at the shape of the distribution using a stem-and-leaf,a distribution is skewed to the right when the left tail is shorter than the right tail.

Accepted Answer

A) True 
 B)False

Stem-and-leaf displays and dot plots are useful for detecting outliers.

Beginning the vertical scale of a graph at a value different from zero can cause increases to look more dramatic.

A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What is the approximate shape of the distribution of the data?

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 How many classes should be used in the construction of a histogram?

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months.Construct a dot plot of these data and describe the distribution. 5,1,4,8,0,6,3,5,3,4,7,15,5,8,2,1,5,4

An observation separated from the rest of the data is a(n)___________.

Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide.They obtained the following results. Construct a table of row percentages.

When grouping a large sample of measurements into classes,the ____ is a better tool than the _.

The sample cumulative distribution function is nondecreasing.

When we wish to summarize the proportion (or fraction)of items in a class,we use the frequency distribution for each class.

It is possible to create different interpretations of the same graphical display by simply using different captions.

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 Complete this frequency table for these data

A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What would be the first class interval for the frequency histogram?

Leaves on a stem-and-leaf display should be rearranged so that they are in increasing order from left to right.

At the end of their final exam,550 students answered an additional question in which they rated the teaching effectiveness of their instructor,with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

The stem-and-leaf display is advantageous because it allows us to actually see the measurements in the data set.

A plot of the values of two variables is a _____ plot.

When establishing the classes for a frequency table,it is generally agreed that the more classes you use,the better your frequency table will be.

Consider the following data. Create a stem-and-leaf display for the sample.

When looking at the shape of the distribution using a stem-and-leaf,a distribution is skewed to the right when the left tail is shorter than the right tail.

An Introduction to Business Statistics

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Process Improvement Using Control Charts

Filters

Exam 2: Descriptive Statistics: Tabular and Graphical Methods

Stem-and-leaf displays and dot plots are useful for detecting outliers.

Beginning the vertical scale of a graph at a value different from zero can cause increases to look more dramatic.

A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What is the approximate shape of the distribution of the data?

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below. 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 How many classes should be used in the construction of a histogram?

The following data consist of the number of sick days taken by the 100 employees at a small manufacturing company for the past 18 months.Construct a dot plot of these data and describe the distribution. 5,1,4,8,0,6,3,5,3,4,7,15,5,8,2,1,5,4

An observation separated from the rest of the data is a(n)___________.

Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide.They obtained the following results. Construct a table of row percentages.

When grouping a large sample of measurements into classes,the ______________ is a better tool than the ___________.

The sample cumulative distribution function is nondecreasing.

When we wish to summarize the proportion (or fraction)of items in a class,we use the frequency distribution for each class.

It is possible to create different interpretations of the same graphical display by simply using different captions.

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 Complete this frequency table for these data

A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What would be the first class interval for the frequency histogram?

Leaves on a stem-and-leaf display should be rearranged so that they are in increasing order from left to right.

At the end of their final exam,550 students answered an additional question in which they rated the teaching effectiveness of their instructor,with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

The stem-and-leaf display is advantageous because it allows us to actually see the measurements in the data set.

A plot of the values of two variables is a _____ plot.

When establishing the classes for a frequency table,it is generally agreed that the more classes you use,the better your frequency table will be.

Consider the following data. Create a stem-and-leaf display for the sample.

When looking at the shape of the distribution using a stem-and-leaf,a distribution is skewed to the right when the left tail is shorter than the right tail.

An Introduction to Business Statistics

Descriptive Statistics: Numerical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Process Improvement Using Control Charts

Filters

When grouping a large sample of measurements into classes,the ____ is a better tool than the _.