Chapter 11.2, Problem 1.1CYU

To determine

To compute: The conditional distribution of the use of Facebook for both of the campus settings

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

Calculation:

The conditional distribution of the use of Facebook for both of the campus settings can be computed as:

Use Facebook	Main Campus	Common wealth
Several times a month or less	$\frac{55}{910}=0.06$	$\frac{76}{627}=0.121$
At least once a week	$\frac{215}{910}=0.236$	$\frac{157}{627}=0.250$
At least once a day	$\frac{640}{910}=0.703$	$\frac{394}{627}=0.628$

Thus, the distribution 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