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

question 4

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

• A) .800
• B) .778
• C) .429
• D) .222
• E) .200

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Definitions:

Income-Expenditure Framework

An economic model describing the relationship between an economy's total income and the spending levels that determines its equilibrium output.

Aggregate Expenditures

The total amount of spending in an economy, including consumption, investment, government spending, and net exports.

Real Gross Domestic Product

The total value of all goods and services produced within a country's borders in a specific time period, adjusted for inflation.

Price Level

The price level is an aggregate measure that reflects the average of current prices across the entire spectrum of goods and services produced in the economy.