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 percent of people surveyed that were male and preferred sports was 30% or 0.3:
0.3(200) = 60

The proportion of people total that preferred reading a book is given by (0.1+0.15) = 0.25; 0.25(200) = 50

The proportion of people surveyed that were female is given by (0.15+0.05+0.15) = 0.35; 0.35(200) = 70