WPC (questions with complete
solutions) A+ graded
Multicollinearity occurs when - correct 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? - correct answer ✔✔there is no significant correlation between the variables x and y
A regression analysis is used to determine the - correct answer ✔✔degree of association between
variables
In a regression model, outliers may be identified by examining the - correct answer ✔✔residuals
Which of the following statements is true for an experimental study? - correct 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 - correct
answer ✔✔hour of additional study, the expected final exam score increases by 4%.
Which of the following questions are unsuitable for A/B testing? - correct 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? -
correct 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? - correct answer ✔✔what language is spoken at home by these students
solutions) A+ graded
Multicollinearity occurs when - correct 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? - correct answer ✔✔there is no significant correlation between the variables x and y
A regression analysis is used to determine the - correct answer ✔✔degree of association between
variables
In a regression model, outliers may be identified by examining the - correct answer ✔✔residuals
Which of the following statements is true for an experimental study? - correct 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 - correct
answer ✔✔hour of additional study, the expected final exam score increases by 4%.
Which of the following questions are unsuitable for A/B testing? - correct 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? -
correct 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? - correct answer ✔✔what language is spoken at home by these students
