Question

the responses of 1322 voters to a survey about the way the media conducted themselves in a recent political campaign are shown in the accompanying pareto chart. find the probability of each event listed in parts (a) through (d) below.

(a) randomly selecting a person from the sample who did not give the media an a or a b
the probability is 0.772
(type an integer or a decimal. round to three decimal places as needed.)

(b) randomly selecting a person from the sample who gave the media a grade better than a d
the probability is 0.409
(type an integer or a decimal. round to three decimal places as needed.)

(c) randomly selecting a person from the sample who gave the media a d or an f
the probability is 0.591
(type an integer or a decimal. round to three decimal places as needed.)

(d) randomly selecting a person from the sample who gave the media a c or a d
the probability is
(type an integer or a decimal. round to three decimal places as needed.)

Explanation:

Identify the given values

Using the Empirical Probability knowledge point

$$
LATEXBLOCK0
$$

Calculate the target frequency

Using the Addition Rule for Probability and Mutually Exclusive Events knowledge points

$$
LATEXBLOCK1
$$

Calculate the empirical probability

Using the Empirical Probability knowledge point

$$
LATEXBLOCK2
$$

Round to three decimal places

Using the Empirical Probability knowledge point

$$
LATEXBLOCK3
$$

Answer:

(d) Randomly selecting a person from the sample who gave the media a C or a D

The probability is <blank>0.377</blank>
(Type an integer or a decimal. Round to three decimal places as needed.)