Question 1

Which of the following statements is true for the following data values: 7,5,6,4,7,8,and 12?

Accepted Answer

A)  The mean,median and mode are all equal 
B)  Only the mean and median are equal 
C)  Only the mean and mode are equal 
D)  Only the median and mode are equal 
A)  The mean,median and mode are all equal 
B)  Only the mean and median are equal 
C)  Only the mean and mode are equal 
D)  Only the median and mode are equal A

Question 2

Excel stores dates as

Accepted Answer

A)  numbers 
B)  variables 
C)  records 
D)  text 
A)  numbers 
B)  variables 
C)  records 
D)  text A

Question 3

The value of the mean times the number of observations equals the sum of all of the data values.

Accepted Answer

A) True 
 B)False  True

Question 4

The median can also be described as the

Accepted Answer

A)  middle observation when the data values are arranged in ascending order 
B)  population mean 
C)  second percentile 
D)  the average of all values 
A)  middle observation when the data values are arranged in ascending order 
B)  population mean 
C)  second percentile 
D)  the average of all values

Question 5

The median of a data set with 30 values would be the average of the 15th and the 16th values when the data values are arranged in ascending order.

Accepted Answer

A) True 
 B)False

Question 6

As a measure of variability,what is defined as the maximum value minus the minimum value?

Accepted Answer

A)  variance 
B)  standard deviation 
C)  mean 
D)  range 
E)  median 
A)  variance 
B)  standard deviation 
C)  mean 
D)  range 
E)  median

Question 7

Where will you find "time" on a time series graph?

Accepted Answer

A)  horizontal axis 
B)  first column 
C)  vertical axis 
D)  last column 
A)  horizontal axis 
B)  first column 
C)  vertical axis 
D)  last column

Question 8

Phone numbers,Social Security numbers,and zip codes are examples of numerical variables.

Accepted Answer

A) True 
 B)False

Question 9

Because they represent such extreme values,outliers should be eliminated from statistical analyses.

Accepted Answer

A) True 
 B)False

Question 10

If a value represents the 95th percentile,this means that

Accepted Answer

A)  95% of all values are below this value 
B)  95% of all values are above this value 
C)  95% of the time you will observe this value 
D)  there is a 5% chance that this value is incorrect 
E)  there is a 95% chance that this value is correct 
A)  95% of all values are below this value 
B)  95% of all values are above this value 
C)  95% of the time you will observe this value 
D)  there is a 5% chance that this value is incorrect 
E)  there is a 95% chance that this value is correct

Question 11

A variable is classified as ordinal if

Accepted Answer

A)  there is a natural ordering of categories 
B)  there is no natural ordering of categories 
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)  there is no natural ordering of categories 
C)  the data arise from continuous measurements 
D)  we track the variable through a period of time

Question 12

A histogram that is positively skewed is also called

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 13

A histogram is based on binning the variable,which means putting the variable into discrete categories.

Accepted Answer

A) True 
 B)False

Question 14

Expressed in percentiles,the interquartile range is the difference between the

Accepted Answer

A)  10th and 60th percentiles 
B)  15th and 65th percentiles 
C)  20th and 70th percentiles 
D)  25th and 75th percentiles 
E)  35th and 85th percentiles 
A)  10th and 60th percentiles 
B)  15th and 65th percentiles 
C)  20th and 70th percentiles 
D)  25th and 75th percentiles 
E)  35th and 85th percentiles

Question 15

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 16

The core purpose of time series graphs is to detect historical patterns in the data.

Accepted Answer

A) True 
 B)False

Question 17

The number of car insurance policy holders is an example of a discrete numerical variable.

Accepted Answer

A) True 
 B)False

Question 18

Mean absolute deviation (MAD)is the average of the squared deviations.

Accepted Answer

A) True 
 B)False

Question 19

In a generic box plot,the x inside the box indicates the location of the

Accepted Answer

A)  mean 
B)  median 
C)  minimum value 
D)  maximum value 
A)  mean 
B)  median 
C)  minimum value 
D)  maximum value

Question 20

A sample of 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

Which of the following statements is true for the following data values: 7,5,6,4,7,8,and 12?

Excel stores dates as

The value of the mean times the number of observations equals the sum of all of the data values.

The median can also be described as the

The median of a data set with 30 values would be the average of the 15^th and the 16^th values when the data values are arranged in ascending order.

As a measure of variability,what is defined as the maximum value minus the minimum value?

Where will you find "time" on a time series graph?

Phone numbers,Social Security numbers,and zip codes are examples of numerical variables.

Because they represent such extreme values,outliers should be eliminated from statistical analyses.

If a value represents the 95^th percentile,this means that

A variable is classified as ordinal if

A histogram that is positively skewed is also called

A histogram is based on binning the variable,which means putting the variable into discrete categories.

Expressed in percentiles,the interquartile range is the difference between the

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

The core purpose of time series graphs is to detect historical patterns in the data.

The number of car insurance policy holders is an example of a discrete numerical variable.

Mean absolute deviation (MAD)is the average of the squared deviations.

In a generic box plot,the x inside the box indicates the location of the

A sample of a population taken at one particular point in time is categorized as:

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

Which of the following statements is true for the following data values: 7,5,6,4,7,8,and 12?

Excel stores dates as

The value of the mean times the number of observations equals the sum of all of the data values.

The median can also be described as the

The median of a data set with 30 values would be the average of the 15th and the 16th values when the data values are arranged in ascending order.

As a measure of variability,what is defined as the maximum value minus the minimum value?

Where will you find "time" on a time series graph?

Phone numbers,Social Security numbers,and zip codes are examples of numerical variables.

Because they represent such extreme values,outliers should be eliminated from statistical analyses.

If a value represents the 95th percentile,this means that

A variable is classified as ordinal if

A histogram that is positively skewed is also called

A histogram is based on binning the variable,which means putting the variable into discrete categories.

Expressed in percentiles,the interquartile range is the difference between the

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

The core purpose of time series graphs is to detect historical patterns in the data.

The number of car insurance policy holders is an example of a discrete numerical variable.

Mean absolute deviation (MAD)is the average of the squared deviations.

In a generic box plot,the x inside the box indicates the location of the

A sample of a population taken at one particular point in time is categorized as:

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

The median of a data set with 30 values would be the average of the 15^th and the 16^th values when the data values are arranged in ascending order.

If a value represents the 95^th percentile,this means that