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

question 70

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 churned?

• A) .143
• B) .168
• C) .571
• D) .857
• E) .885

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Definitions:

Voters

Individuals who have the right to vote in an election, playing a crucial role in democratic processes by selecting leaders and deciding on legislative matters.

Candidates

Individuals who offer themselves for a role, position, or job, often through a selection or election process.

Utility Function

A mathematical representation of how consumers rank different bundles of goods according to their level of satisfaction.

SAT Tests

Standardized tests widely used for college admissions in the United States, assessing mathematical, reading, and writing skills.