HBX final Exam | Verified Exam Questions and Answers | Latest Updated
Study Material 2026
Question:
Suppose we want to assign dummy variables to the seasons (Winter, Spring, Summer, Fall). How
many dummy variables do we need?
Answer:
3
Question:
If the developer wanted to create a regression model to predict housing starts from all the other
financial variables, which of the following would be INDEPENDENT variables? (Select all that
apply.)
Answer:
It's all the variables that make up the price during the
year...
Question:
The variables for location and wine consumption are collinear. VS:
The variable for location is a better predictor than wine consumption.
Answer:
The first is true of this manager's shitty regression analysis experiments
because that's what happens when the coefficient for one variable is no longer significant and the
other variable's R-squared value goes up, yet the adjusted R-squared has decreased.
Question:
average vs averageIF
(Don't forget descriptive statistics)
~mean
Answer:
AverageIF is a conditional, limiting scope to something.
Like if we're looking for the average IF so and so is doing something...
, Question:
square root of variance = standard dev.
Answer:
Question:
scatterplot showing a downward 'slope' (really dots descending); some more clumped on each
end, few in middle. What's the likely correlation?
-.8, -.2, .2, or .8?
Answer:
-.8
Question:
watch for ':' vs ','
Answer:
Question:
If the prices are listed in cells A2:A26, which of the following Excel functions would calculate
the 95th percentile?
Answer:
PERCENTILE.INC(A2:A26,0.95)
Question:
NOT "0.05"!!!
For a sample with x =15, s=2, and n=25, which of the following formula would calculate the
upper bound of the 95% confidence interval for the true population mean?
Answer:
=15+CONFIDENCE.T(0.05,2,25)
Question:
NOT
=15+CONFIDENCE.T(0.025,2,25)
A popular hair salon wants to gather data about how returning customers rate the quality of the
service they received during their most recent appointment. The owner decides to use a survey to
gather this data. What is the BEST option for selecting respondents to the survey?
Study Material 2026
Question:
Suppose we want to assign dummy variables to the seasons (Winter, Spring, Summer, Fall). How
many dummy variables do we need?
Answer:
3
Question:
If the developer wanted to create a regression model to predict housing starts from all the other
financial variables, which of the following would be INDEPENDENT variables? (Select all that
apply.)
Answer:
It's all the variables that make up the price during the
year...
Question:
The variables for location and wine consumption are collinear. VS:
The variable for location is a better predictor than wine consumption.
Answer:
The first is true of this manager's shitty regression analysis experiments
because that's what happens when the coefficient for one variable is no longer significant and the
other variable's R-squared value goes up, yet the adjusted R-squared has decreased.
Question:
average vs averageIF
(Don't forget descriptive statistics)
~mean
Answer:
AverageIF is a conditional, limiting scope to something.
Like if we're looking for the average IF so and so is doing something...
, Question:
square root of variance = standard dev.
Answer:
Question:
scatterplot showing a downward 'slope' (really dots descending); some more clumped on each
end, few in middle. What's the likely correlation?
-.8, -.2, .2, or .8?
Answer:
-.8
Question:
watch for ':' vs ','
Answer:
Question:
If the prices are listed in cells A2:A26, which of the following Excel functions would calculate
the 95th percentile?
Answer:
PERCENTILE.INC(A2:A26,0.95)
Question:
NOT "0.05"!!!
For a sample with x =15, s=2, and n=25, which of the following formula would calculate the
upper bound of the 95% confidence interval for the true population mean?
Answer:
=15+CONFIDENCE.T(0.05,2,25)
Question:
NOT
=15+CONFIDENCE.T(0.025,2,25)
A popular hair salon wants to gather data about how returning customers rate the quality of the
service they received during their most recent appointment. The owner decides to use a survey to
gather this data. What is the BEST option for selecting respondents to the survey?
