Question 1

The empirical rule states all the following except

Accepted Answer

A)  Almost all observations fall in the interval x ± 3s. 
B)  Approximately 95% of all observations fall in the interval x ± 2s. 
C)  Approximately 65% of all observations fall in the interval x ± s. 
D)  Approximately 68% of all observations fall in the interval x ± s. 
A)  Almost all observations fall in the interval x ± 3s. 
B)  Approximately 95% of all observations fall in the interval x ± 2s. 
C)  Approximately 65% of all observations fall in the interval x ± s. 
D)  Approximately 68% of all observations fall in the interval x ± s.

Question 2

What is the arithmetic mean in the following table on the variable score?

Accepted Answer

A)  0.93 
B)  0.88 
C)  0.735 
D)  0.8450 
A)  0.93 
B)  0.88 
C)  0.735 
D)  0.8450

Question 3

As a researcher, you should be mindful on constructing and interpreting graphs. All of the following are recommended guidelines you should follow except for one. Which one does not reflect a guideline?

Accepted Answer

A)  The simplest graph should be used for a given set of data. 
B)  Axis should be clearly marked and labeled. 
C)  On a bar chart or histogram, bar widths should always reflect various widths of the data. 
D)  Be mindful of the upper limits on the vertical axis to prevent compression, hiding variant details. 
A)  The simplest graph should be used for a given set of data. 
B)  Axis should be clearly marked and labeled. 
C)  On a bar chart or histogram, bar widths should always reflect various widths of the data. 
D)  Be mindful of the upper limits on the vertical axis to prevent compression, hiding variant details.

Question 4

Find the Mean Absolute Deviation (MAD) of 10, 9, 3, 8, 10.

Accepted Answer

A)  5 
B)  2 
C)  8 
D)  4 
A)  5 
B)  2 
C)  8 
D)  4

Question 5

The following scatterplot is of % of fat and BMI Index Score. What type of linear relationship is being displayed?

Accepted Answer

A)  negative linear relationship 
B)  positive linear relationship 
C)  no relationship 
D)  scattered negative relationship 
A)  negative linear relationship 
B)  positive linear relationship 
C)  no relationship 
D)  scattered negative relationship

Question 6

Below is the Scatterplot of 2 numeric variables. What type of relationship is represented?

Accepted Answer

A)  nonlinear relationship 
B)  linear relationship 
C)  matrix relationship 
D)  no relationship 
A)  nonlinear relationship 
B)  linear relationship 
C)  matrix relationship 
D)  no relationship

Question 7

Simone is a marketing consultant hired to review the product sales for a new high-end barista machine line. The product line has four variations, selling in four specialty store regions. To clearly show where each variation is selling best and in which regions, she plans to provide a color-scaled chart using percentage by type and location. What is the name of the chart she will be using?

Accepted Answer

A)  pivot table 
B)  bubble plot 
C)  color map 
D)  heat map 
A)  pivot table 
B)  bubble plot 
C)  color map 
D)  heat map

Question 8

If the coefficient correlation is computed to be -0.85, this means the relationship between the two variables are _______.

Accepted Answer

A)  strong, but positive 
B)  weak and negative 
C)  weak, but positive 
D)  strong, but negative 
A)  strong, but positive 
B)  weak and negative 
C)  weak, but positive 
D)  strong, but negative

Question 9

Using R, Bart wants to create a bar chart showing the frequency of the color of cars that pass over the I-270 overpass at the Main Street exit. What function should he use?

Accepted Answer

A)  table 
B)  barplot 
C)  abline 
D)  view 
A)  table 
B)  barplot 
C)  abline 
D)  view

Question 10

Alex is working on an investment portfolio reviewing Gas and Diesel summary statistics. Which investment would be the better risk per unit, assuming Rf = 2?

Accepted Answer

A)  Gas provides a higher Sharpe ratio with 34.2178, thus more reward per unit of risk. 
B)  Gas provides a higher Sharpe ratio with 61.1395, thus more reward per unit of risk. 
C)  Diesel provides a higher Sharpe ratio with 59.3583, thus more reward per unit of risk. 
D)  Diesel provides a higher Sharpe ratio with 42.9331, thus more reward per unit of risk. 
A)  Gas provides a higher Sharpe ratio with 34.2178, thus more reward per unit of risk. 
B)  Gas provides a higher Sharpe ratio with 61.1395, thus more reward per unit of risk. 
C)  Diesel provides a higher Sharpe ratio with 59.3583, thus more reward per unit of risk. 
D)  Diesel provides a higher Sharpe ratio with 42.9331, thus more reward per unit of risk.

Question 11

The following chart represents the results of a two categorical variable study reflecting on education level survey in 2006 and the same survey results from 2016. Which type of chart is being displayed?

Accepted Answer

A)  scatterplot 
B)  contingency table 
C)  histogram 
D)  stacked column chart 
A)  scatterplot 
B)  contingency table 
C)  histogram 
D)  stacked column chart

Question 12

The standard deviation of midterm scores and the final exam are 8 and 6, respectively. Which of the two exams offers more risk and why?

Accepted Answer

A)  Both the midterm and the final share the same amount of risk. 
B)  The midterm exam is riskier because the standard deviation is higher. 
C)  The final exam is riskier because the standard deviation is lower. 
D)  There is not enough information to determine which is the riskier of the two. 
A)  Both the midterm and the final share the same amount of risk. 
B)  The midterm exam is riskier because the standard deviation is higher. 
C)  The final exam is riskier because the standard deviation is lower. 
D)  There is not enough information to determine which is the riskier of the two.

Question 13

In the following Boxplot, the left whisker is longer than the right whisker. This indicates that the underlining distribution is _______.

Accepted Answer

A)  negatively skewed 
B)  median skewed 
C)  positively skewed 
D)  no indicated skewed 
A)  negatively skewed 
B)  median skewed 
C)  positively skewed 
D)  no indicated skewed

Question 14

If the correlations coefficient is 0, then

Accepted Answer

A)  x and y are not linearly related. 
B)  x and y are absolute and perfectly related. 
C)  x and y have a perfect positive relationship. 
D)  x and y have a perfect negative relationship. 
A)  x and y are not linearly related. 
B)  x and y are absolute and perfectly related. 
C)  x and y have a perfect positive relationship. 
D)  x and y have a perfect negative relationship.

Question 15

The mean credit score is 645 out of 310 used car loan applicants with a standard deviation of 17. Assuming a bell-shaped curve, what is the number of loan applicants that fall within a score of 611 and 679?

Accepted Answer

A)  68 
B)  211 
C)  295 
D)  310 
A)  68 
B)  211 
C)  295 
D)  310

Question 16

Using the following table, what is the percent of the relative frequency of a Blue car being observed?

Accepted Answer

A)  21.48% 
B)  2.148% 
C)  20.3% 
D)  0.2148% 
A)  21.48% 
B)  2.148% 
C)  20.3% 
D)  0.2148%

Question 17

The standard deviation of midterm scores and the final exam are 10.0 and 7.0, respectively. Which of the two exams offers more risk and why?

Accepted Answer

A)  Both the midterm and the final share the same amount of risk. 
B)  The midterm exam is riskier because the standard deviation is higher. 
C)  The midterm exam is riskier because the standard deviation is lower. 
D)  There is not enough information to determine which is the riskier of the two. 
A)  Both the midterm and the final share the same amount of risk. 
B)  The midterm exam is riskier because the standard deviation is higher. 
C)  The midterm exam is riskier because the standard deviation is lower. 
D)  There is not enough information to determine which is the riskier of the two.

Question 18

What is the only meaningful measure of the central location for a categorical variable?

Accepted Answer

A)  mean 
B)  mode 
C)  median 
D)  model 
A)  mean 
B)  mode 
C)  median 
D)  model

Question 19

In analyzing the S&P 500 and the XYZ Inc. in a five-year study, the covariance (S&P 500, XYZ Inc.) is 4,254.40. What kind of linear relationship does the S&P 500 and the XYZ Inc. have?

Accepted Answer

A)  a negative linear relationship 
B)  a positive linear relationship 
C)  no linear relationship 
D)  a neutral linear relationship 
A)  a negative linear relationship 
B)  a positive linear relationship 
C)  no linear relationship 
D)  a neutral linear relationship

Question 20

Candice is preparing for her final exam in Statistics. She knows she needs an 80 out of 100 to earn an A overall in the course. Her instructor provided the following information to the students. 
-On the final, 200 students have taken it with a mean score of 72 and a standard deviation of 6. Assume the distribution of scores is bell-shaped. Calculate to see if a score of 80 is within one standard deviation of the mean.

Accepted Answer

A)  Yes, 80 is the upper number of one standard deviation from the mean. 
B)  No, the upper level of one standard deviation is 78. 
C)  Yes, 80 is greater than the 66, one standard deviation below the mean. 
D)  No, 80 is greater than the mean of 72. 
A)  Yes, 80 is the upper number of one standard deviation from the mean. 
B)  No, the upper level of one standard deviation is 78. 
C)  Yes, 80 is greater than the 66, one standard deviation below the mean. 
D)  No, 80 is greater than the mean of 72.

The empirical rule states all the following except

What is the arithmetic mean in the following table on the variable score?

As a researcher, you should be mindful on constructing and interpreting graphs. All of the following are recommended guidelines you should follow except for one. Which one does not reflect a guideline?

Find the Mean Absolute Deviation (MAD) of 10, 9, 3, 8, 10.

The following scatterplot is of % of fat and BMI Index Score. What type of linear relationship is being displayed?

Below is the Scatterplot of 2 numeric variables. What type of relationship is represented?

If the coefficient correlation is computed to be -0.85, this means the relationship between the two variables are _______.

Using R, Bart wants to create a bar chart showing the frequency of the color of cars that pass over the I-270 overpass at the Main Street exit. What function should he use?

Alex is working on an investment portfolio reviewing Gas and Diesel summary statistics. Which investment would be the better risk per unit, assuming R_f = 2?

The following chart represents the results of a two categorical variable study reflecting on education level survey in 2006 and the same survey results from 2016. Which type of chart is being displayed?

The standard deviation of midterm scores and the final exam are 8 and 6, respectively. Which of the two exams offers more risk and why?

In the following Boxplot, the left whisker is longer than the right whisker. This indicates that the underlining distribution is _______.

If the correlations coefficient is 0, then

The mean credit score is 645 out of 310 used car loan applicants with a standard deviation of 17. Assuming a bell-shaped curve, what is the number of loan applicants that fall within a score of 611 and 679?

Using the following table, what is the percent of the relative frequency of a Blue car being observed?

The standard deviation of midterm scores and the final exam are 10.0 and 7.0, respectively. Which of the two exams offers more risk and why?

What is the only meaningful measure of the central location for a categorical variable?

In analyzing the S&P 500 and the XYZ Inc. in a five-year study, the covariance (S&P 500, XYZ Inc.) is 4,254.40. What kind of linear relationship does the S&P 500 and the XYZ Inc. have?

Introduction to Business Analytics

Data Management and Wrangling

Probability and Probability Distributions

Statistical Inference

Regression Analysis

Advanced Regression Analysis

Introduction to Data Mining

Supervised Data Mining: K-Nearest Neighbors and Naãve Bayes

Supervised Data Mining: Decision Trees

Unsupervised Data Mining

Forecasting With Time Series Data

Introduction to Prescriptive Analytics

Filters

Exam 3: Data Visualization and Summary Measures

The empirical rule states all the following except

What is the arithmetic mean in the following table on the variable score?

As a researcher, you should be mindful on constructing and interpreting graphs. All of the following are recommended guidelines you should follow except for one. Which one does not reflect a guideline?

Find the Mean Absolute Deviation (MAD) of 10, 9, 3, 8, 10.

The following scatterplot is of % of fat and BMI Index Score. What type of linear relationship is being displayed?

Below is the Scatterplot of 2 numeric variables. What type of relationship is represented?

If the coefficient correlation is computed to be -0.85, this means the relationship between the two variables are _______.

Using R, Bart wants to create a bar chart showing the frequency of the color of cars that pass over the I-270 overpass at the Main Street exit. What function should he use?

Alex is working on an investment portfolio reviewing Gas and Diesel summary statistics. Which investment would be the better risk per unit, assuming Rf = 2?

The following chart represents the results of a two categorical variable study reflecting on education level survey in 2006 and the same survey results from 2016. Which type of chart is being displayed?

The standard deviation of midterm scores and the final exam are 8 and 6, respectively. Which of the two exams offers more risk and why?

In the following Boxplot, the left whisker is longer than the right whisker. This indicates that the underlining distribution is _______.

If the correlations coefficient is 0, then

The mean credit score is 645 out of 310 used car loan applicants with a standard deviation of 17. Assuming a bell-shaped curve, what is the number of loan applicants that fall within a score of 611 and 679?

Using the following table, what is the percent of the relative frequency of a Blue car being observed?

The standard deviation of midterm scores and the final exam are 10.0 and 7.0, respectively. Which of the two exams offers more risk and why?

What is the only meaningful measure of the central location for a categorical variable?

In analyzing the S&P 500 and the XYZ Inc. in a five-year study, the covariance (S&P 500, XYZ Inc.) is 4,254.40. What kind of linear relationship does the S&P 500 and the XYZ Inc. have?

Introduction to Business Analytics

Data Management and Wrangling

Probability and Probability Distributions

Statistical Inference

Regression Analysis

Advanced Regression Analysis

Introduction to Data Mining

Supervised Data Mining: K-Nearest Neighbors and Naãve Bayes

Supervised Data Mining: Decision Trees

Unsupervised Data Mining

Forecasting With Time Series Data

Introduction to Prescriptive Analytics

Filters

Alex is working on an investment portfolio reviewing Gas and Diesel summary statistics. Which investment would be the better risk per unit, assuming R_f = 2?