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

question 25

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 at least 511 minutes online per day and sent an average of at least 7 emails per day from their ISP-provided email address, what is the sample proportion of those who churned?

• A) .078
• B) .143
• C) .200
• D) .571
• E) .778

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Definitions:

Higher Management

Senior-level executives or administrators in an organization responsible for making strategic decisions and overseeing overall operations.

Team Player

One who emphasizes group accomplishment and cooperation rather than individual achievement and not helping others.

Emotional Support

Providing comfort, reassurance, and understanding to someone to help them cope with emotional distress or difficulties.

Micromanager

An individual, often a manager or supervisor, who excessively controls or oversees the work of subordinates, often with excessive attention to minor details.