SB 7.1 - population mean

Question

1. Weston asked 20 of his friends, ‘Are you going skiing this weekend?” Eight of the 20 said yes, they are going skiing. What would be the best estimate for the population mean?

 

a. 0.4

b. 8

c. 40

d. 0.8

Answer 1

This binomial

n=20, p=8/20

 

E(X)= np = 20*8/20 = 8

 

The correct answer is option b