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

question 65

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. Assume they classify those with a churn probability estimate (based on the sample proportion) of at least .5 as churners. Based on this classification tree, a member of the study sample who spent an average of 327 minutes online per day, sent an average of 4 emails per day from their ISP-provided email address, placed no service calls, and churned would be

• A) inaccurately classified as a churner.
• B) inaccurately classified as a non-churner.
• C) accurately classified as a churner.
• D) accurately classified as a non-churner.

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Definitions:

Y Chromosome

A sex chromosome that is typically present in male organisms, contributing to male sex determination and related characteristics.

Chromosomes

Threadlike structures made of DNA molecules that carry genetic information in the form of genes.

X Chromosome

One of the two sex chromosomes, X and Y, with the X chromosome carrying a significant number of genes essential for many bodily functions and characteristics.

Genetic Inheritance

The transmission of genetic information from parents to their offspring through genes.