Proportion question

Question

Approximately 20% of cars in the United States are white. You take a simple random sample of 170 cars on Etown's campus and find that 37 are white. What is the proportion p̂ of white cars on Etown's campus?

Answer 1

p-hat = X/n, where n is the number of cars on Etown's campus and X is the number of white cars on Etown's campus.

p-hat = 37/170 ≈ 0.2176

The proportion of white cars on Etown's campus is about 0.2176.