Question 1

Age,height,and weight are examples of numerical data.

Accepted Answer

A) True 
 B)False

Question 2

The average score for a class of 30 students was 75.The 20 male students in the class averaged 70.The 10 female students in the class averaged

Accepted Answer

A)  75 
B)  85 
C)  60 
D)  70 
E)  80 
A)  75 
B)  85 
C)  60 
D)  70 
E)  80

Question 3

As a graphical tool,the histogram is ideal for showing whether the distribution of a numerical variable is symmetric or skewed.

Accepted Answer

A) True 
 B)False

Question 4

Data can be categorized as cross-sectional or time series.

Accepted Answer

A) True 
 B)False

Question 5

A data set is typically a rectangular array of data,with observations in columns and variables in rows.

Accepted Answer

A) True 
 B)False

Question 6

With symmetric,"bell-shaped" distributions,approximately what percent of the observations are within two standard deviations of the mean?

Accepted Answer

A)  50% 
B)  68% 
C)  95% 
D)  99.7% 
E)  100% 
A)  50% 
B)  68% 
C)  95% 
D)  99.7% 
E)  100%

Question 7

The mean is a measure of central tendency.

Accepted Answer

A) True 
 B)False

Question 8

The difference between the first and third quartile is called the

Accepted Answer

A)  interquartile range 
B)  interdependent range 
C)  unimodal range 
D)  bimodal range 
E)  mid range 
A)  interquartile range 
B)  interdependent range 
C)  unimodal range 
D)  bimodal range 
E)  mid range

Question 9

Categorizing age variables as "young," "middle-aged," and "elderly" is an example of

Accepted Answer

A)  counting 
B)  ordering 
C)  value adding 
D)  binning 
E)  categorizing 
A)  counting 
B)  ordering 
C)  value adding 
D)  binning 
E)  categorizing

Question 10

What is the most common type of chart for showing the distribution of a numerical variable?

Accepted Answer

A)  time series graph 
B)  histogram 
C)  bin 
D)  box plot 
A)  time series graph 
B)  histogram 
C)  bin 
D)  box plot

Question 11

There are four quartiles that divide the values in a data set into four equal parts.

Accepted Answer

A) True 
 B)False

Question 12

Categorical variables can be classified as either discrete or continuous.

Accepted Answer

A) True 
 B)False

Question 13

Abby has been keeping track of what she spends to rent movies.The last seven week's expenditures,in dollars,were 6,4,8,9,6,12,and 4.The mean amount Abby spends on renting movies is $7.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following are the three most common measures of central tendency?

Accepted Answer

A)  Mean,median,and mode 
B)  Mean,variance,and standard deviation 
C)  Mean,median,and variance 
D)  Mean,median,and standard deviation 
E)  First quartile,second quartile,and third quartile 
A)  Mean,median,and mode 
B)  Mean,variance,and standard deviation 
C)  Mean,median,and variance 
D)  Mean,median,and standard deviation 
E)  First quartile,second quartile,and third quartile

Question 15

Assume that the histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values were between 55 and 95.

Accepted Answer

A) True 
 B)False

Question 16

The length of the box in the box plot portrays the

Accepted Answer

A)  mean 
B)  median 
C)  range 
D)  interquartile range 
E)  third quartile 
A)  mean 
B)  median 
C)  range 
D)  interquartile range 
E)  third quartile

Question 17

A population includes all elements or objects of interest in a study,whereas a sample is a subset of the population used to gain insights into the characteristics of the population.

Accepted Answer

A) True 
 B)False

Question 18

A variable (or field or attribute)is a characteristic of members of a population,whereas an observation (or case or record)is a list of all variable values for a single member of a population.

Accepted Answer

A) True 
 B)False

Question 19

In order for the characteristics of a sample to be generalized to the entire population,it should be:

Accepted Answer

A)  symbolic of the population 
B)  atypical of the population 
C)  representative of the population 
D)  illustrative of the population 
A)  symbolic of the population 
B)  atypical of the population 
C)  representative of the population 
D)  illustrative of the population

Question 20

In the term "frequency table," frequency refers to the counts of observations in specified categories.

Accepted Answer

A) True 
 B)False

Age,height,and weight are examples of numerical data.

The average score for a class of 30 students was 75.The 20 male students in the class averaged 70.The 10 female students in the class averaged

As a graphical tool,the histogram is ideal for showing whether the distribution of a numerical variable is symmetric or skewed.

Data can be categorized as cross-sectional or time series.

A data set is typically a rectangular array of data,with observations in columns and variables in rows.

With symmetric,"bell-shaped" distributions,approximately what percent of the observations are within two standard deviations of the mean?

The mean is a measure of central tendency.

The difference between the first and third quartile is called the

Categorizing age variables as "young," "middle-aged," and "elderly" is an example of

What is the most common type of chart for showing the distribution of a numerical variable?

There are four quartiles that divide the values in a data set into four equal parts.

Categorical variables can be classified as either discrete or continuous.

Abby has been keeping track of what she spends to rent movies.The last seven week's expenditures,in dollars,were 6,4,8,9,6,12,and 4.The mean amount Abby spends on renting movies is $7.

Which of the following are the three most common measures of central tendency?

Assume that the histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values were between 55 and 95.

The length of the box in the box plot portrays the

A population includes all elements or objects of interest in a study,whereas a sample is a subset of the population used to gain insights into the characteristics of the population.

A variable (or field or attribute)is a characteristic of members of a population,whereas an observation (or case or record)is a list of all variable values for a single member of a population.

In order for the characteristics of a sample to be generalized to the entire population,it should be:

In the term "frequency table," frequency refers to the counts of observations in specified categories.

Introduction to Data Analysis and Decision Making

Finding Relationships Among Variables

Probability and Probability Distributions

Normal, Binomial, Poisson, and Exponential Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Hypothesis Testing

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Importing Data Into Excel

Analysis of Variance and Experimental Design

Statistical Process Control

Filters

Exam 2: Describing the Distribution of a Single Variable

Age,height,and weight are examples of numerical data.

The average score for a class of 30 students was 75.The 20 male students in the class averaged 70.The 10 female students in the class averaged

As a graphical tool,the histogram is ideal for showing whether the distribution of a numerical variable is symmetric or skewed.

Data can be categorized as cross-sectional or time series.

A data set is typically a rectangular array of data,with observations in columns and variables in rows.

With symmetric,"bell-shaped" distributions,approximately what percent of the observations are within two standard deviations of the mean?

The mean is a measure of central tendency.

The difference between the first and third quartile is called the

Categorizing age variables as "young," "middle-aged," and "elderly" is an example of

What is the most common type of chart for showing the distribution of a numerical variable?

There are four quartiles that divide the values in a data set into four equal parts.

Categorical variables can be classified as either discrete or continuous.

Abby has been keeping track of what she spends to rent movies.The last seven week's expenditures,in dollars,were 6,4,8,9,6,12,and 4.The mean amount Abby spends on renting movies is $7.

Which of the following are the three most common measures of central tendency?

Assume that the histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values were between 55 and 95.

The length of the box in the box plot portrays the

A population includes all elements or objects of interest in a study,whereas a sample is a subset of the population used to gain insights into the characteristics of the population.

A variable (or field or attribute)is a characteristic of members of a population,whereas an observation (or case or record)is a list of all variable values for a single member of a population.

In order for the characteristics of a sample to be generalized to the entire population,it should be:

In the term "frequency table," frequency refers to the counts of observations in specified categories.

Introduction to Data Analysis and Decision Making

Finding Relationships Among Variables

Probability and Probability Distributions

Normal, Binomial, Poisson, and Exponential Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Hypothesis Testing

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Importing Data Into Excel

Analysis of Variance and Experimental Design

Statistical Process Control

Filters