Chapter 11.2, Problem 1.2CYU

To determine

To explain: The reason of using the proportion rather than count for making comparison

Explanation of Solution

Given:

The table is:

Use Facebook	Main Campus	Common wealth
Several times a month or less	55	76
At least once a week	215	157
At least once a day	640	394
Total Facebook users	910	627

The proportion table is:

Use Facebook	Main Campus	Common wealth
Several times a month or less	0.06	0.121
At least once a week	0.236	0.250
At least once a day	0.703	0.628

From the count table, it is known that there is a huge difference between the sample size of two campuses which makes the comparison impossible. Thus, proportions have been computed to make the comparison and reach at the conclusion.