Question

To estimate the number of people in springfield, population 10,000, who have a swimming pool in their backyard, 250 people were interviewed. of those polled, 119 had a swimming pool. how many people in the city might one expect to have a swimming pool? (round to the nearest whole number, if necessary.)
a. 4760 people
c. 21,008 people
b. 3 people
d. 476 people

Answer 1

The answer is A...........

Answer 2

So 119 out of 250 people had a pool in their backyard...119/250 = 47.6%

so out of 10,000 people, expected value of ones with a pool is :
47.6% of 10,000 ...
0.476 * 10,000 = 4760 people <===