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

question 42

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 223 sampled customers, what is the sample proportion of those who did not churn?

• A) .078
• B) .143
• C) .168
• D) .571
• E) .857

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Definitions:

Composes

To create or put together elements or components in a particular form or structure, such as writing music, authoring documents, or assembling pieces to form a whole.

High-context Cultures

Cultures in which communication relies heavily on the underlying context, implied messages, and non-verbal cues rather than on explicit verbal communication.

Written Messages

Any information or communication expressed through written words in various formats, including letters, emails, reports, and memos.

Verbal Messages

Communication that involves the use of words, spoken or written, for the purpose of conveying information or expressing ideas.