8/23/25, 2:13 AM QBA Final Exam Study
QBA Study Guide FINAL EXAM 2025-2026 –Practice Questions and
accurate, detailed answers, latest update
The 28.56% sample statistic.
What is the population? All Ohio customer
Amazon wants to determine 11,890 customers
if how many of their Ohio
customers are part of the
'Subscribe & Save'
program. They take a
sample of 15 customers
from each zip code in Ohio
(for a total of 11,890
customers).
They find that 28.56% of
those customers have
received a 'Subscribe &
Save' delivery in the past 3
months.
When you want to fairly Their z-scores
compare two values from
different distributions, what
should you use?
What does a Z-score of 2.02 The value is above the mean
mean?
In the scenario above, what Population Parameter
is the population mean of
60?
/ 1/1
3
, 8/23/25, 2:13 AM QBA Final Exam Study
What tells you the average Standard Error
difference between the
predicted Y value and the
actual Y value?
What does the value of the The change in Y if X changes by 1 unit
slope in the regression
equation tell you?
In the Regression Equation, The value of Y when X is 0
what is the Y- intercept?
What is the purpose of the Allows you to predict Y values based on known X values
Regression Equation?
What P (probability) value <= .05
tells us the relationship is
significant?
Linear relationships can be... Either positive or negative
What is the purpose of To predict one variable based on a known variable and
simple linear correlation
regression?
If the correlation coefficient Very strong negative correlation
between 2 variables is -0.89,
what is the strength of the
correlation?
Pearson's Correlation is used Quantitative
to analyze the relationship
between what kind of
variables?
Why should we take the -It helps communicate the data more clearly
time to format -It makes the work look more professional
spreadsheets?
What is used to draw Contrast
attention to headings and
distinguish them from the
data in tables?
/ 2/1
3
QBA Study Guide FINAL EXAM 2025-2026 –Practice Questions and
accurate, detailed answers, latest update
The 28.56% sample statistic.
What is the population? All Ohio customer
Amazon wants to determine 11,890 customers
if how many of their Ohio
customers are part of the
'Subscribe & Save'
program. They take a
sample of 15 customers
from each zip code in Ohio
(for a total of 11,890
customers).
They find that 28.56% of
those customers have
received a 'Subscribe &
Save' delivery in the past 3
months.
When you want to fairly Their z-scores
compare two values from
different distributions, what
should you use?
What does a Z-score of 2.02 The value is above the mean
mean?
In the scenario above, what Population Parameter
is the population mean of
60?
/ 1/1
3
, 8/23/25, 2:13 AM QBA Final Exam Study
What tells you the average Standard Error
difference between the
predicted Y value and the
actual Y value?
What does the value of the The change in Y if X changes by 1 unit
slope in the regression
equation tell you?
In the Regression Equation, The value of Y when X is 0
what is the Y- intercept?
What is the purpose of the Allows you to predict Y values based on known X values
Regression Equation?
What P (probability) value <= .05
tells us the relationship is
significant?
Linear relationships can be... Either positive or negative
What is the purpose of To predict one variable based on a known variable and
simple linear correlation
regression?
If the correlation coefficient Very strong negative correlation
between 2 variables is -0.89,
what is the strength of the
correlation?
Pearson's Correlation is used Quantitative
to analyze the relationship
between what kind of
variables?
Why should we take the -It helps communicate the data more clearly
time to format -It makes the work look more professional
spreadsheets?
What is used to draw Contrast
attention to headings and
distinguish them from the
data in tables?
/ 2/1
3
