Chapter 2.2, Problem 2.32E

(a)

To determine

To Explain: that it seems to prefer texting or talking on the phone.

Explanation of Solution

Given:

Showing the difference (texts-calls) in the number of text messages and calls sent and received

  

By seeing the box plot which is showing the difference (texts-calls) in the number of text message and calls sent and received it is observed that almost box plot lies to the right of 0, which indicating with positive differences between calls and texts therefore it looks to be more texts than calls.

(b)

To determine

To Explain: that is it possible to make any conclusion about the preferences on the basis of the given data.

Answer to Problem 2.32E

Not possible

Explanation of Solution

No, it is not possible to draw any conclusion because one class is not representative for all students and not all students have the moment to be covered in the data. In addition, it is possible that this class aggressively deviated in its text messaging and call behaviour.