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

question 34

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, how many churned?

• A) 9
• B) 7
• C) 5
• D) 2
• E) 1

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Definitions:

Social Isolation

A state where an individual lacks a sense of social belonging, social engagement, and fulfilling relationships.

Dizygotic Development

The biological process resulting in the birth of two or more offspring from the same pregnancy with each developing from a separate egg fertilized by its own sperm, also known as fraternal twinning.

Nature And Nurture

The debate concerning the relative importance of an individual's innate qualities (nature) versus personal experiences (nurture) in determining or causing differences in physical and behavioral traits.

Environmentally Adaptive

The ability of an organism or a system to adjust or change in response to environmental factors.