Question

in a survey conducted at a pet store, 150 customers were asked if they own birds or fish. the survey data are shown in the relative - frequency table.

	own a bird	do not own a bird	total
do not own fish	0.02	0.86
total

what percentage of the people surveyed own a bird?
a. 6%
b. 4%
c. 0.06%
d. 2%

Explanation:

Step1: Recall the concept of relative - frequency

The relative - frequency of owning a bird is the sum of the relative - frequencies of owning a bird and owning fish and owning a bird and not owning fish.

Step2: Calculate the relative - frequency of owning a bird

The relative - frequency of owning a bird and owning fish is 0.04, and the relative - frequency of owning a bird and not owning fish is 0.02.
The relative - frequency of owning a bird is \(0.04 + 0.02=0.06\).

Step3: Convert relative - frequency to percentage

To convert a relative - frequency to a percentage, multiply by 100.
\(0.06\times100 = 6\%\)

Answer:

A. 6%