Question 1

When a histogram is negatively skewed,it ________.

Accepted Answer

A) is symmetrical 
B) tails off to the left 
C) has a slope lesser than one 
D) tails off to the right 
A) is symmetrical 
B) tails off to the left 
C) has a slope lesser than one 
D) tails off to the right

Question 2

Given that the standard deviation is equal to 0.568,the median equals 5,and the mean value is 3.5,what is the value of the coefficient of variation?

Accepted Answer

A) 0.1136 
B) 0.162 
C) 6.16 
D) 0.7 
A) 0.1136 
B) 0.162 
C) 6.16 
D) 0.7

Question 3

If the distribution of observations were perfectly symmetrical and unimodal,________.

Accepted Answer

A) the mean would be greater than the mode 
B) the mean,median,and mode would be the same 
C) the mode would be lesser than the median 
D) the median would be greater than the mean 
A) the mean would be greater than the mode 
B) the mean,median,and mode would be the same 
C) the mode would be lesser than the median 
D) the median would be greater than the mean

Question 4

Sketch a positively skewed distribution.

Accepted Answer

The answer of Sketch a positively skewed distribution....

Question 5

The degree of asymmetry of observations around the mean is measured by the ________.

Accepted Answer

A) coefficient of correlation 
B) coefficient of symmetry 
C) coefficient of skewness 
D) coefficient of deviation 
A) coefficient of correlation 
B) coefficient of symmetry 
C) coefficient of skewness 
D) coefficient of deviation

Question 6

Use the table below to answer the following question(s).The table shows the crude oil prices in dollars per barrel,for 2007.  
-Locate the median price of crude oil in 2007.

Accepted Answer

The answer of Use the table below to answer the...

Question 7

Which of the following state(s)that for any set of data,the proportion of values that lie within k standard deviations (k>1)of the mean is at least 1 - 1/k2?

Accepted Answer

A) empirical rules 
B) interquartile range 
C) Chebyshev's theorem 
D) standard deviation 
A) empirical rules 
B) interquartile range 
C) Chebyshev's theorem 
D) standard deviation

Question 8

Sketch a perfectly symmetrical and unimodal distribution.

Accepted Answer

The answer of Sketch a perfectly symmetrical and unimodal distribution....

Question 9

The ________ is the middle value when the data are arranged from smallest to largest.

Accepted Answer

A) mode 
B) median 
C) midrange 
D) arithmetic mean 
A) mode 
B) median 
C) midrange 
D) arithmetic mean

Question 10

The degree of flatness or peakedness of a population is measured by the ________.

Accepted Answer

A) coefficient of kurtosis 
B) coefficient of skewness 
C) coefficient of variation 
D) coefficient of deviation 
A) coefficient of kurtosis 
B) coefficient of skewness 
C) coefficient of variation 
D) coefficient of deviation

Question 11

The ________ is the observation that occurs the most frequently in the data set.

Accepted Answer

A) arithmetic mean 
B) median 
C) mode 
D) midrange 
A) arithmetic mean 
B) median 
C) mode 
D) midrange

Question 12

The standard deviation for a sample is denoted as ________.

Accepted Answer

A) μ 
B) Ω 
C) s 
D) σ 
A) μ 
B) Ω 
C) s 
D) σ

Question 13

In Microsoft Excel 2010,the function that computes the standard deviation of a set of data,assumed to be a population,is ________.

Accepted Answer

A) STDEV.S(data range) 
B) STAND.SNGL(data range) 
C) STDEV.P(data range) 
D) STAND.MULT(data range) 
A) STDEV.S(data range) 
B) STAND.SNGL(data range) 
C) STDEV.P(data range) 
D) STAND.MULT(data range)

Question 14

A histogram with exactly two peaks ________.

Accepted Answer

A) is unimodal 
B) has a low degree of kurtosis 
C) has the same values for mean and mode 
D) is bimodal 
A) is unimodal 
B) has a low degree of kurtosis 
C) has the same values for mean and mode 
D) is bimodal

Question 15

The coefficient of variation (CV)is calculated as ________.

Accepted Answer

A) mode/standard deviation 
B) standard deviation/mean 
C) standard deviation/variance 
D) range/standard deviation 
A) mode/standard deviation 
B) standard deviation/mean 
C) standard deviation/variance 
D) range/standard deviation

Question 16

Using Chebyshev's theorem,k = 2 would mean that ________.

Accepted Answer

A) at least two-thirds of the data lie within two standard deviations of the mean 
B) at least 89% of the data lie within two standard deviations of the mean 
C) less than three-fourths of the data lie within three standard deviations of the mean 
D) at least three-fourths of the data lie within two standard deviations of the mean 
A) at least two-thirds of the data lie within two standard deviations of the mean 
B) at least 89% of the data lie within two standard deviations of the mean 
C) less than three-fourths of the data lie within three standard deviations of the mean 
D) at least three-fourths of the data lie within two standard deviations of the mean

Question 17

A coefficient of skewness that indicates relative symmetry would lie between ________.

Accepted Answer

A) 0.5 and -0.5 
B) 5 and -5 
C) 1 and -1 
D) 0.95 and 1 
A) 0.5 and -0.5 
B) 5 and -5 
C) 1 and -1 
D) 0.95 and 1

Question 18

Explain Chebyshev's theorem.

Accepted Answer

Chebyshev's theorem states that for any

Question 19

The standard deviation is the square root of the variance.

Accepted Answer

A) True 
 B)False

Question 20

One-fourth of the data falls below the ________ quartile.

Accepted Answer

A) fourth 
B) second 
C) first 
D) third 
A) fourth 
B) second 
C) first 
D) third

When a histogram is negatively skewed,it ________.

Given that the standard deviation is equal to 0.568,the median equals 5,and the mean value is 3.5,what is the value of the coefficient of variation?

If the distribution of observations were perfectly symmetrical and unimodal,________.

Sketch a positively skewed distribution.

The degree of asymmetry of observations around the mean is measured by the ________.

Use the table below to answer the following question(s).The table shows the crude oil prices in dollars per barrel,for 2007. -Locate the median price of crude oil in 2007.

Which of the following state(s)that for any set of data,the proportion of values that lie within k standard deviations (k>1)of the mean is at least 1 - 1/k²?

Sketch a perfectly symmetrical and unimodal distribution.

The ________ is the middle value when the data are arranged from smallest to largest.

The degree of flatness or peakedness of a population is measured by the ________.

The ________ is the observation that occurs the most frequently in the data set.

The standard deviation for a sample is denoted as ________.

In Microsoft Excel 2010,the function that computes the standard deviation of a set of data,assumed to be a population,is ________.

A histogram with exactly two peaks ________.

The coefficient of variation (CV)is calculated as ________.

Using Chebyshev's theorem,k = 2 would mean that ________.

A coefficient of skewness that indicates relative symmetry would lie between ________.

Explain Chebyshev's theorem.

The standard deviation is the square root of the variance.

One-fourth of the data falls below the ________ quartile.

Data and Business Decisions

Probability Concepts and Distributions

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

Exam 2: Descriptive Statistics and Data Analysis

When a histogram is negatively skewed,it ________.

Given that the standard deviation is equal to 0.568,the median equals 5,and the mean value is 3.5,what is the value of the coefficient of variation?

If the distribution of observations were perfectly symmetrical and unimodal,________.

Sketch a positively skewed distribution.

The degree of asymmetry of observations around the mean is measured by the ________.

Use the table below to answer the following question(s).The table shows the crude oil prices in dollars per barrel,for 2007. -Locate the median price of crude oil in 2007.

Which of the following state(s)that for any set of data,the proportion of values that lie within k standard deviations (k>1)of the mean is at least 1 - 1/k2?

Sketch a perfectly symmetrical and unimodal distribution.

The ________ is the middle value when the data are arranged from smallest to largest.

The degree of flatness or peakedness of a population is measured by the ________.

The ________ is the observation that occurs the most frequently in the data set.

The standard deviation for a sample is denoted as ________.

In Microsoft Excel 2010,the function that computes the standard deviation of a set of data,assumed to be a population,is ________.

A histogram with exactly two peaks ________.

The coefficient of variation (CV)is calculated as ________.

Using Chebyshev's theorem,k = 2 would mean that ________.

A coefficient of skewness that indicates relative symmetry would lie between ________.

Explain Chebyshev's theorem.

The standard deviation is the square root of the variance.

One-fourth of the data falls below the ________ quartile.

Data and Business Decisions

Probability Concepts and Distributions

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

Which of the following state(s)that for any set of data,the proportion of values that lie within k standard deviations (k>1)of the mean is at least 1 - 1/k²?