HBX Core Final Exam With 100% Correct And Verified Answers
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Module
HBX CORE
Institution
HBX CORE
HBX Core Final Exam With 100% Correct And Verified Answers
A/B Test - Correct Answer-1) An experiment that compares the value of a dependent variable (ex = likelihood that a website visitor purchases an item) across two different groups (control group and treatment group). Members of each group ...
HBX Core Final Exam With 100% Correct
And Verified Answers
A/B Test - Correct Answer-1) An experiment that compares
the value of a dependent variable (ex = likelihood that a
website visitor purchases an item) across two different
groups (control group and treatment group). Members of
each group must be RANDOMLY SELECTED to ensure
that the only difference between the groups is the
"MANIPULATED" independent variable (ex = size of the
font on two otherwise identical websites)...a hypothesis test
that tests whether the means of the dependent variable are
the same across the two groups; also used to test whether
another parameter - ex = standard deviation - is the same
across two groups
Adjusted R-Squared - Correct Answer-Measure of
explanatory power of a regression analysis. Adjusted R
squared = R-squared*adjustment factor that decreases
slightly as each independent variable is added to regression
model. Adjusted R-squared DROPS when a new
independent variable is added that does not improve the
model's true explanatory power (vs. R-squared which never
decreases when a new independent variable is added to a
regression model). Adjusted R-Squared should always be
used when comparing the explanatory power of regression
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, models that have different numbers of independent
variables.
Alternative Hypothesis - Correct Answer-Theory or claim
we are trying to substantiate and stated as OPPOSITE OF A
NULL HYPOTHESIS. When data allow us to nullify the
null hypothesis, we substantiate the alternative hypothesis.
Asymmetric Distribution - Correct Answer-Probability
distribution that is not symmetric AROUND THE MEAN
Average/Mean - Correct Answer-For a distribution with
discrete values, mean = values of all data points in the set /
number of data points
Base Case - Correct Answer-Category of categorical
variable for which a dummy variable is NOT included in a
regression model. A regression model with a categorical
variable that has n categories should have n-1 dummy
variables. The coefficients of the dummy variables included
in the regression model are interpreted in relation to the
base case. The analyst can select any category to be excluded
from the regression model; however, different base cases
lead to different interpretations of the dummy variables'
coefficients. Ex: Suppose we are trying to determine the
average difference in height between men and women in a
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