Question 1

Cross-sectional data are data on a population at a distinct point in time,whereas time series data are data collected over time.

Accepted Answer

A) True 
 B)False

Question 2

The difference between the largest and smallest values in a data set is called the range.

Accepted Answer

A) True 
 B)False

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

A histogram that is positively skewed may also be described as

Accepted Answer

A) skewed to the right. 
B) skewed to the left. 
C) balanced. 
D) symmetric. 
A) skewed to the right. 
B) skewed to the left. 
C) balanced. 
D) symmetric.

Question 5

A variable is classified as ordinal if

Accepted Answer

A) there is a natural ordering of categories. 
B) the data is randomly selected. 
C) the data arise from continuous measurements. 
D) we track the variable through a period of time. 
A) there is a natural ordering of categories. 
B) the data is randomly selected. 
C) the data arise from continuous measurements. 
D) we track the variable through a period of time.

Question 6

A sample,selected from a population,taken at one particular point in time is categorized as

Accepted Answer

A) categorical. 
B) discrete. 
C) cross-sectional. 
D) time-series. 
A) categorical. 
B) discrete. 
C) cross-sectional. 
D) time-series.

Question 7

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

Accepted Answer

A) Column chart 
B) Histogram 
C) Two-way table 
D) Pie chart 
A) Column chart 
B) Histogram 
C) Two-way table 
D) Pie chart

Question 8

A sample of 8 observations with a sample standard deviation of 2.50 has a sample variance of 17.50.

Accepted Answer

A) True 
 B)False

Question 9

A political figure running for re-election claimed that the country was better off in 2014 than in 2019,because the average income decreased.Do you agree?

Accepted Answer

Although the average income de

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

Coding males as 1 and females as 0 in a data set illustrates the use of _____ variables.

Accepted Answer

A) nominal 
B) dummy 
C) numerical 
D) ordinal 
A) nominal 
B) dummy 
C) numerical 
D) ordinal

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

In a box plot,the vertical line inside the box indicates the location of the

Accepted Answer

A) mean. 
B) median. 
C) mode. 
D) standard deviation. 
A) mean. 
B) median. 
C) mode. 
D) standard deviation.

Question 14

Categorizing a numeric age variable as "young," "middle-aged," and "elderly" is an example of

Accepted Answer

A) counting. 
B) ordering. 
C) quantifying. 
D) binning. 
A) counting. 
B) ordering. 
C) quantifying. 
D) binning.

Question 15

Generate parallel box plots to summarize the data.What do the box plots indicate?

Accepted Answer

@#IMG-DLM& The box plots show that there

Question 16

The interquartile range (IQR)encompasses what percent of the observations?

Accepted Answer

A) Lower 25% 
B) Middle 50% 
C) Upper 75% 
D) Upper 90% 
A) Lower 25% 
B) Middle 50% 
C) Upper 75% 
D) Upper 90%

Question 17

Time series graphs chart the values of one or more time series,using time on the vertical axis.

Accepted Answer

A) True 
 B)False

Question 18

If a value represents the 95th percentile,this means that 95% of all values in the data set are _____this value.

Accepted Answer

A) less than or equal to 
B) greater than 
C) less than 
D) greater than or equal to 
E) different than 
A) less than or equal to 
B) greater than 
C) less than 
D) greater than or equal to 
E) different than

Question 19

In an extremely right-skewed distribution,the mean is less than the median.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following characteristics can be used to describe the skewness of a distribution?

Accepted Answer

A) The mean 
B) Kurtosis 
C) The median 
D) The standard deviation 
A) The mean 
B) Kurtosis 
C) The median 
D) The standard deviation

Cross-sectional data are data on a population at a distinct point in time,whereas time series data are data collected over time.

The difference between the largest and smallest values in a data set is called the range.

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

A histogram that is positively skewed may also be described as

A variable is classified as ordinal if

A sample,selected from a population,taken at one particular point in time is categorized as

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

A sample of 8 observations with a sample standard deviation of 2.50 has a sample variance of 17.50.

A political figure running for re-election claimed that the country was better off in 2014 than in 2019,because the average income decreased.Do you agree?

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

Coding males as 1 and females as 0 in a data set illustrates the use of _____ variables.

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

In a box plot,the vertical line inside the box indicates the location of the

Categorizing a numeric age variable as "young," "middle-aged," and "elderly" is an example of

Generate parallel box plots to summarize the data.What do the box plots indicate?

The interquartile range (IQR)encompasses what percent of the observations?

Time series graphs chart the values of one or more time series,using time on the vertical axis.

If a value represents the 95^th percentile,this means that 95% of all values in the data set are _____this value.

In an extremely right-skewed distribution,the mean is less than the median.

Which of the following characteristics can be used to describe the skewness of a distribution?

Introduction to Business Analytics

Finding Relationships Among Variables

Business Intelligence Bifor Data Analysis

Probability and Probability 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

Analysis of Variance and Experimental Design

Statistical Process Control

Filters

Exam 2: Describing the Distribution of a Variable

Cross-sectional data are data on a population at a distinct point in time,whereas time series data are data collected over time.

The difference between the largest and smallest values in a data set is called the range.

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

A histogram that is positively skewed may also be described as

A variable is classified as ordinal if

A sample,selected from a population,taken at one particular point in time is categorized as

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

A sample of 8 observations with a sample standard deviation of 2.50 has a sample variance of 17.50.

A political figure running for re-election claimed that the country was better off in 2014 than in 2019,because the average income decreased.Do you agree?

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

Coding males as 1 and females as 0 in a data set illustrates the use of _____ variables.

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

In a box plot,the vertical line inside the box indicates the location of the

Categorizing a numeric age variable as "young," "middle-aged," and "elderly" is an example of

Generate parallel box plots to summarize the data.What do the box plots indicate?

The interquartile range (IQR)encompasses what percent of the observations?

Time series graphs chart the values of one or more time series,using time on the vertical axis.

If a value represents the 95th percentile,this means that 95% of all values in the data set are _____this value.

In an extremely right-skewed distribution,the mean is less than the median.

Which of the following characteristics can be used to describe the skewness of a distribution?

Introduction to Business Analytics

Finding Relationships Among Variables

Business Intelligence Bifor Data Analysis

Probability and Probability 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

Analysis of Variance and Experimental Design

Statistical Process Control

Filters

If a value represents the 95^th percentile,this means that 95% of all values in the data set are _____this value.