When should “expected value” be considered as a metric for model evaluation?

What is a “data-driven network effect” as described in the provided materials?

What is Social Proof?

You are a network administrator evaluating the usefulness of a model for detecting an unauthorized accesses (considered a positive observation in your model.) However, you are very concerned that you not waste time tracking down accesses that turn out to be authorized. Given this confusion matrix, what is the probability that, if your model predicts that an access is an intrusion, the access is really an intrusion? Assume these classifications: TP = 4, TN = 5, FP = 1, FN = 2

What is a Two-Sided Market?

When setting up an online retail business, what is the role of registering a “domain name”?

What is a Data Mart?

You are trying to evaluate the stand-alone risk characteristics of ABC Corp. Over the past four years, ABC stock has returned 4.3%, -3.7%, 21.8%, and 14.6%, respectively, on an annual basis.  What is ABC’s expected return? (Answer in percentage terms and round answer to 2 decimal places. Do not round intermediate calculations) [ER] What is the standard deviation on ABC stock? (Answer in percentage terms and round answer to 2 decimal places. Do not round intermediate calculations) [SD]

You are trying to evaluate the stand-alone risk characteristics of ABC Corp. Over the past four years, ABC stock has returned -15.7%, 28.7%, 19.6%, and 4.1%, respectively, on an annual basis.  What is ABC’s expected return? (Answer in percentage terms and round answer to 2 decimal places. Do not round intermediate calculations) [ER] What is the standard deviation on ABC stock? (Answer in percentage terms and round answer to 2 decimal places. Do not round intermediate calculations) [SD]

Which one of the following is the positively sloped linear function that is created when expected returns are graphed against security betas?