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

question 92

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 less than 7 emails per day from their ISP-provided email address, what is the sample proportion of those who did not churn?

• A) .078
• B) .143
• C) .200
• D) .211
• E) .222

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Definitions:

Inhibit Expression

The suppression or restraint of showing or voicing feelings, thoughts, or attitudes, often due to social norms, personal insecurities, or fear of negative evaluation.

Control Over Emotions

The ability to regulate one's emotional responses or feelings in various situations.

Achieve Control

The process of gaining command or influence over something, ensuring predictability and stability in a given context.

Philosophy

An academic discipline that explores fundamental questions about existence, knowledge, values, reason, mind, and language.