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 .
(type an integer or a decimal. round to three decimal places as needed.)

Explanation:

Identify the given data

Using the Pareto Chart knowledge point

$$
LATEXBLOCK0
$$

Define the target event

Using the Empirical Probability knowledge point

$$
LATEXBLOCK1
$$

Calculate the probability

Using the Empirical Probability knowledge point

$$
LATEXBLOCK2
$$

Answer:

(b) Randomly selecting a person from the sample who gave the media a grade better than a D

The probability is <blank>0.409</blank>.
(Type an integer or a decimal. Round to three decimal places as needed.)