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

question 99

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 less than 511 minutes online per day and placed fewer than 3 service calls, what is the sample proportion of those who churned?

• A) .067
• B) .078
• C) .529
• D) .861
• E) .885

Identify and describe various cognitive strategies employed by children as they develop.

Understand the principles of naive physics in infants.

Grasp the concept and importance of metacognition in cognitive development.

Understand the concept of sexual orientation and its categorizations.

---

Definitions:

Modal Class

The class interval with the highest frequency in a frequency distribution, representing the most common category or range of data.

Observations

The collection of data points or information obtained through watching, measuring, or recording something.

Histogram

A graphical representation of data using bars of different heights to show the frequency distribution of a dataset.

Interval Data

A type of data that is measured along a scale, where each point is placed at a specific distance from others, but there is no true zero point.