Question

In a survey 200 people were polled at a local shopping center about spending free time playing sports, watching a movie, or reading a book. The relative frequency table below displays the results.
MOVIE SPORTS READ
MALE 0.25 0.30 0.10
FEMALE 0.15 0.05 0.15

a. How many males surveyed preferred playing sports?

b. How many people surveyed preferred to read a book?

c. How many females were surveyed?

Answer 1

a) 60
b) 50
c) 70

The proportion of males that prefer sports is 0.3; 0.3(200) = 60
The proportion of people that prefer to read is (0.15+0.1) = 0.25; 0.25(200) = 50
The proportion of people that are female is (0.15+0.05+0.15) = 0.35; 0.35(200) = 70