Multicollinearity occurs when - Answer-two independent variables in the regression model are highly correlated
What would be an example of a null hypothesis when you are testing correlations between random variables x and y? - Answer-there is no significant correlation between the variables x an...
WPC Exam Study Guide Questions and
Answers
Multicollinearity occurs when - Answer-two independent variables in the regression
model are highly correlated
What would be an example of a null hypothesis when you are testing correlations
between random variables x and y? - Answer-there is no significant correlation between
the variables x and y
A regression analysis is used to determine the - Answer-degree of association between
variables
In a regression model, outliers may be identified by examining the - Answer-residuals
Which of the following statements is true for an experimental study? - Answer-A proper
design of the experiment is required to study a certain effect of the intervention
In a linear regression model, the dependent variable is "Final exam score (%) for WPC
300" and the independent variable is "Hours studied". A coefficient of 4 could be
interpreted as for every - Answer-hour of additional study, the expected final exam
score increases by 4%.
Which of the following questions are unsuitable for A/B testing? - Answer-which feature
should I launch next?
For a given problem, if you determined that you need to predict the outcome to make a
decision and also anticipate the behavioral change of the subject, what kind of big guns
analysis would you perform? - Answer-Game theory model and simulation
You are using 100 college students to find out how hours of revision affect their
performance in a college-level Spanish language exam. Which of the following variables
could be a confounding variable for your study? - Answer-what language is spoken at
home by these students
Data visualization is important because: - Answer-90% of the information transmitted to
the brain is visual
The starting point in telling a compelling story is: - Answer-revisiting your problem
definition
In the picture below, which principle of data visualization is not met: - Answer-The
principle of graphical integrity
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