An Internet Service Provider (ISP) Has Randomly Selected a Sample

question 11

Multiple Choice

An internet service provider (ISP) has randomly selected a sample of 223 observations concerning values of the response variable Churn and several predictor variables based on customer activity during the most recently billed month. Here Churn equals Yes if a customer churned-left the internet service provider for another ISP-and equals No otherwise. The predictor variable MinutesOn is the average daily minutes the customer spent online. EmailSent is the average daily number of emails the customer sent from the email address provided by the ISP. ServCalls is the number of times the customer called for service. Below is part of the classification tree they derived from the data collected in the study. Of the sampled customers who spent an average of less than 511 minutes online per day and placed at least 3 service calls, how many did not churn?

• A) 7
• B) 8
• C) 9
• D) 15
• E) 17

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Definitions:

Child

A young human being below the age of puberty or below the legal age of majority.

Voluntary Responses

Behaviors that are under conscious control, typically as a result of conscious decision making.

Thorndike

Edward Thorndike was an influential psychologist known for his work on learning theory and the Law of Effect.

Researchers

Individuals who systematically investigate and study materials, sources, and subjects to establish facts and reach new conclusions.