Chapter 5.2, Problem 49E

a)

To determine

To find individuals and variables.

Answer to Problem 49E

An individual is “all students in the urban school” and the variables are Eat breakfast regularly and Gender.

Explanation of Solution

First need to understand about individual and variable:

Individual: It is the objects which described by the set of the data.

Variable: It is the topic in which study is investigated.

Therefore, for given study, individual is “all students in the urban school”. The variables are Eat breakfast regularly and Gender.

b)

To determine

To find probabilities.

Explanation of Solution

Given:

	Male	Female	Total
Eats breakfast regularly	190	110	300
Doesn't Eats breakfast regularly	130	165	295
Total	320	275	595

Formula:

  $Probability=\frac{Numberoffavorableoutcomes}{Totalpossibleoutcomes}$

Probability of female:

  $Probability=\frac{275}{595}=0.4622$

Probability that eats breakfast regularly:

  $Probability=\frac{300}{595}=0.5042$

Probability that female who eats breakfast regularly:

  $Probability=\frac{110}{595}=0.1849$

Probability of females or someone who eats breakfast regularly:

  $Probability=\frac{190+110+165}{595}=0.7815$