Question 1

The distribution pictured below is

Accepted Answer

A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left. 
A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left.

Question 2

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Accepted Answer

Amusing and colorful but drama

Question 3

A study found the following parts per billion of nitrosamines in a sample of domestic beers.(a)Construct a frequency distribution of four classes with equal class sizes.(b)Construct another frequency distribution of four classes using unequal class intervals or an open-ended interval for the highest class.(c)Which frequency distribution is preferable? Why?

Accepted Answer

Answers will vary.Sturges' Rul

Question 4

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Accepted Answer

Funny pictures,attention-getti

Question 5

If you have 256 data points,how many classes (bins)would Sturges' Rule suggest?

Accepted Answer

A) 6 
B) 7 
C) 8 
D) 9 
A) 6 
B) 7 
C) 8 
D) 9

Question 6

Excel's pyramid chart is generally preferred to a plain 2D column chart.

Accepted Answer

A) True 
 B)False

Question 7

The distribution pictured below is

Accepted Answer

A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left. 
A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left.

Question 8

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Accepted Answer

Colorful and amusing,but no clue what is

Question 9

A histogram can be defined as

Accepted Answer

A) a chart whose bar widths show the cumulative frequencies of data values. 
B) a chart whose bar widths indicate class intervals and whose areas indicate frequencies. 
C) a chart whose bar widths show class intervals and whose heights indicate frequencies. 
D) a chart whose bar heights represent the value of each data point. 
A) a chart whose bar widths show the cumulative frequencies of data values. 
B) a chart whose bar widths indicate class intervals and whose areas indicate frequencies. 
C) a chart whose bar widths show class intervals and whose heights indicate frequencies. 
D) a chart whose bar heights represent the value of each data point.

Question 10

Histograms generally do not reveal the

Accepted Answer

A) exact data range. 
B) modal classes (bins). 
C) degree of skewness. 
D) relative frequencies. 
A) exact data range. 
B) modal classes (bins). 
C) degree of skewness. 
D) relative frequencies.

Question 11

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Accepted Answer

Colorful,but cute subtitle adds nothing;

Question 12

Sturges' Rule should override judgment about the "right" number of histogram bins.

Accepted Answer

A) True 
 B)False

Question 13

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Accepted Answer

As pie charts go,not too bad (

Question 14

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the highest observed speed?

Accepted Answer

A) 92 
B) 90 
C) 87 
D) Impossible to tell 
A) 92 
B) 90 
C) 87 
D) Impossible to tell

Question 15

Ten part-time servers at a high-end restaurant were asked how many hours they worked last week and how much they earned.The results are shown below.(a)Make a scatter plot.(b)Describe it.(c)What is your best guess of the average hourly pay?

Accepted Answer

Clearly a positive relationshi

Question 16

Which criterion is least likely to be used in choosing bins (classes)in a frequency distribution?

Accepted Answer

A) Following Sturges' Rule 
B) Selecting "nice" class (bin)limits 
C) Using aesthetic judgment 
D) Always starting at zero 
A) Following Sturges' Rule 
B) Selecting "nice" class (bin)limits 
C) Using aesthetic judgment 
D) Always starting at zero

Question 17

The Pareto chart is used to display the "vital few" causes of problems.

Accepted Answer

A) True 
 B)False

Question 18

When using a dot plot with a small sample,which is least apparent?

Accepted Answer

A) Dispersion of data values within the array 
B) The overall shape of the distribution 
C) Central tendency of data in the data set 
D) Location of data values within the array 
A) Dispersion of data values within the array 
B) The overall shape of the distribution 
C) Central tendency of data in the data set 
D) Location of data values within the array

Question 19

A frequency distribution usually has equal bin widths.

Accepted Answer

A) True 
 B)False

Question 20

Bob found an error in the following frequency distribution.What is it?

Accepted Answer

A) The class limits are overlapping too much. 
B) The classes are not collectively exhaustive. 
C) There are too many classes by Sturges' Rule. 
D) The first class must start at 0. 
A) The class limits are overlapping too much. 
B) The classes are not collectively exhaustive. 
C) There are too many classes by Sturges' Rule. 
D) The first class must start at 0.

The distribution pictured below is

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

If you have 256 data points,how many classes (bins)would Sturges' Rule suggest?

Excel's pyramid chart is generally preferred to a plain 2D column chart.

The distribution pictured below is

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

A histogram can be defined as

Histograms generally do not reveal the

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Sturges' Rule should override judgment about the "right" number of histogram bins.

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the highest observed speed?

Ten part-time servers at a high-end restaurant were asked how many hours they worked last week and how much they earned.The results are shown below.(a)Make a scatter plot.(b)Describe it.(c)What is your best guess of the average hourly pay?

Which criterion is least likely to be used in choosing bins (classes)in a frequency distribution?

The Pareto chart is used to display the "vital few" causes of problems.

When using a dot plot with a small sample,which is least apparent?

A frequency distribution usually has equal bin widths.

Bob found an error in the following frequency distribution.What is it?

Overview of Statistics

Data Collection

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters

Exam 3: Describing Data Visually

The distribution pictured below is

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

If you have 256 data points,how many classes (bins)would Sturges' Rule suggest?

Excel's pyramid chart is generally preferred to a plain 2D column chart.

The distribution pictured below is

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

A histogram can be defined as

Histograms generally do not reveal the

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Sturges' Rule should override judgment about the "right" number of histogram bins.

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the highest observed speed?

Ten part-time servers at a high-end restaurant were asked how many hours they worked last week and how much they earned.The results are shown below.(a)Make a scatter plot.(b)Describe it.(c)What is your best guess of the average hourly pay?

Which criterion is least likely to be used in choosing bins (classes)in a frequency distribution?

The Pareto chart is used to display the "vital few" causes of problems.

When using a dot plot with a small sample,which is least apparent?

A frequency distribution usually has equal bin widths.

Bob found an error in the following frequency distribution.What is it?

Overview of Statistics

Data Collection

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters