Question 1

Identify the shape of the distribution in the below figure.

Accepted Answer

A)  Moderately skewed left 
B)  Symmetric 
C)  Highly skewed right 
D)  Moderately skewed right 
A)  Moderately skewed left 
B)  Symmetric 
C)  Highly skewed right 
D)  Moderately skewed right

Question 2

Any data value with a z-score less than -3 or greater than +3 is treated as a(n)

Accepted Answer

A)  outlier. 
B)  usual value. 
C)  whisker. 
D)  z-score value. 
A)  outlier. 
B)  usual value. 
C)  whisker. 
D)  z-score value.

Question 3

Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data?

Accepted Answer

A)  Number of nonoverlapping bins, width of each bin, and bin limits 
B)  Width of each bin and bin lower limits 
C)  Number of overlapping bins, width of each bin, and bin upper limits 
D)  Width of each bin and number of bins 
A)  Number of nonoverlapping bins, width of each bin, and bin limits 
B)  Width of each bin and bin lower limits 
C)  Number of overlapping bins, width of each bin, and bin upper limits 
D)  Width of each bin and number of bins

Question 4

A summary of data that shows the number of observations in each of several nonoverlapping bins is called

Accepted Answer

A)  a frequency distribution. 
B)  a sample summary. 
C)  a bin distribution. 
D)  an observed distribution. 
A)  a frequency distribution. 
B)  a sample summary. 
C)  a bin distribution. 
D)  an observed distribution.

Question 5

A student willing to participate in a debate competition required to fill a registration form. State whether each of the following information about the participant provides categorical or quantitative data. 
a. What is your date of birth?
b. Have you participated in any debate competition previously?
c. If yes, how many debate competitions have you participated so far?
d. Have you won any of the competitions?
e. If yes, how many have you won?

Accepted Answer

a. Quantitative.
b.

Question 6

The data on the percentage of visitors in the previous and current years at 12 well-known national parks of Unites States are given below:
   
a. Sort the parks in descending order by their current year's visitor percentage. Which park has the highest number of visitors in the current year? Which park has the lowest number of visitors in the current year?
b. Calculate the change in visitor percentage from the previous to the current year for each park. Use Excel's conditional formatting to highlight the park whose visitor percentage decreased from the previous year to the current year.
c. Use Excel's conditional formatting tool to create data bars for the change in visitor percentage from the previous year to the current year for each park calculated in part b.

Accepted Answer

a. The sorted list of parks for the curr

Question 7

The difference in a variable measured over observations (time, customers, items, etc.) is called as _____.

Accepted Answer

A)  observed differences 
B)  variation 
C)  variable change 
D)  descriptive analytics 
A)  observed differences 
B)  variation 
C)  variable change 
D)  descriptive analytics

Question 8

A _____ determines how far a particular value is from the mean relative to the data set's standard deviation.

Accepted Answer

A)  coefficient of variation 
B)  z-score 
C)  variance 
D)  percentile 
A)  coefficient of variation 
B)  z-score 
C)  variance 
D)  percentile

Question 9

Compute the 50th percentile for the following data: 
10 15 17 21 25 12 16 11 13 22

Accepted Answer

A)  18.6 
B)  13.3 
C)  15.5 
D)  17.7 
A)  18.6 
B)  13.3 
C)  15.5 
D)  17.7

Question 10

The correlation coefficient will always take values

Accepted Answer

A)  greater than 0. 
B)  between -1 and 0. 
C)  between -1 and +1. 
D)  less than -1. 
A)  greater than 0. 
B)  between -1 and 0. 
C)  between -1 and +1. 
D)  less than -1.

Question 11

The _____ is a point estimate of the population mean for the variable of interest.

Accepted Answer

A)  sample mean 
B)  median 
C)  Sample 
D)  geometric mean 
A)  sample mean 
B)  median 
C)  Sample 
D)  geometric mean

Question 12

A study on the average minutes spent by students on internet usage is 300 with a standard deviation of 102. Answer the following questions assuming a bell-shaped distribution and using the empirical rule. 
a. What percentage of students use internet for more than 402 minutes?
b. What percentage of students use internet for more than 504 minutes?
c. What percentage of students use internet between 198 minutes and 300 minutes?

Accepted Answer

a. 402 is one standard deviation above t

Question 13

_____ is a graphical summary of data previously summarized in a frequency distribution.

Accepted Answer

A)  Box plot 
B)  Histogram 
C)  Line chart 
D)  Scatter chart 
A)  Box plot 
B)  Histogram 
C)  Line chart 
D)  Scatter chart

Question 14

The following table provides information on the number of billionaires in a country and the continents on which these countries are located.
   a. Sort the countries from largest to smallest based on the number of billionaires. What are the top 5 countries according to the number of billionaires?
 b. Filter the countries to display only the countries located in North America.

Accepted Answer

@#IMG-DLM& 
a.
The top five countries wi

Question 15

A set of values corresponding to a set of variables is defined as a(n) _____.

Accepted Answer

A)  quantity 
B)  event 
C)  factor 
D)  observation 
A)  quantity 
B)  event 
C)  factor 
D)  observation

Question 16

Which of the following gives the proportion of items in each bin?

Accepted Answer

A)  Frequency 
B)  Percent frequency 
C)  Relative frequency 
D)  Bin proportion 
A)  Frequency 
B)  Percent frequency 
C)  Relative frequency 
D)  Bin proportion

Question 17

The partial relative frequency distribution is given below:
   
a. What is the relative frequency of group 4?
b. The total sample size is 400. What is the frequency of group 4?
c. Show the frequency distribution.
d. Show the percent frequency distribution.

Accepted Answer

a. The relative frequency of g

Question 18

Which of the following graphs provide information on outliers and IQR of a data set?

Accepted Answer

A)  Histogram 
B)  Line chart 
C)  Scatter chart 
D)  Box plot 
A)  Histogram 
B)  Line chart 
C)  Scatter chart 
D)  Box plot

Question 19

The variance is based on the

Accepted Answer

A)  deviation about the median. 
B)  number of variables. 
C)  deviation about the mean. 
D)  correlation in the data. 
A)  deviation about the median. 
B)  number of variables. 
C)  deviation about the mean. 
D)  correlation in the data.

Question 20

_____ provide facts and figures that can be used for analysis and interpretation of a population of interest.

Accepted Answer

A)  Data 
B)  Variables 
C)  Range 
D)  Query 
A)  Data 
B)  Variables 
C)  Range 
D)  Query

Identify the shape of the distribution in the below figure.

Any data value with a z-score less than -3 or greater than +3 is treated as a(n)

Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data?

A summary of data that shows the number of observations in each of several nonoverlapping bins is called

The difference in a variable measured over observations (time, customers, items, etc.) is called as _____.

A _____ determines how far a particular value is from the mean relative to the data set's standard deviation.

Compute the 50th percentile for the following data: 10 15 17 21 25 12 16 11 13 22

The correlation coefficient will always take values

The _____ is a point estimate of the population mean for the variable of interest.

_____ is a graphical summary of data previously summarized in a frequency distribution.

A set of values corresponding to a set of variables is defined as a(n) _____.

Which of the following gives the proportion of items in each bin?

The partial relative frequency distribution is given below: a. What is the relative frequency of group 4? b. The total sample size is 400. What is the frequency of group 4? c. Show the frequency distribution. d. Show the percent frequency distribution.

Which of the following graphs provide information on outliers and IQR of a data set?

The variance is based on the

_____ provide facts and figures that can be used for analysis and interpretation of a population of interest.

Introduction

Data Visualization

Linear Regression

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Exam 2: Descriptive Statistics

Identify the shape of the distribution in the below figure.

Any data value with a z-score less than -3 or greater than +3 is treated as a(n)

Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data?

A summary of data that shows the number of observations in each of several nonoverlapping bins is called

The difference in a variable measured over observations (time, customers, items, etc.) is called as _____.

A _____ determines how far a particular value is from the mean relative to the data set's standard deviation.

Compute the 50th percentile for the following data: 10 15 17 21 25 12 16 11 13 22

The correlation coefficient will always take values

The _____ is a point estimate of the population mean for the variable of interest.

_____ is a graphical summary of data previously summarized in a frequency distribution.

A set of values corresponding to a set of variables is defined as a(n) _____.

Which of the following gives the proportion of items in each bin?

The partial relative frequency distribution is given below: a. What is the relative frequency of group 4? b. The total sample size is 400. What is the frequency of group 4? c. Show the frequency distribution. d. Show the percent frequency distribution.

Which of the following graphs provide information on outliers and IQR of a data set?

The variance is based on the

_____ provide facts and figures that can be used for analysis and interpretation of a population of interest.

Introduction

Data Visualization

Linear Regression

Time Series Analysis and Forecasting

Data Mining

Spreadsheet Models

Linear Optimization Models

Integer Linear Optimization Models

Nonlinear Optimization Models

Monte Carlo Simulation

Decision Analysis

Filters