Question

state police believe that 70 of the drivers traveling on a major interstate highway what is the mean and standard deviation

Answer 1

Answer:0.051

Explanation:

p=70%=0.70

The standard deviation of the sampling distribution of the sample proportion is the square root of the product of p and q divided by the sample size n:

=squareroot(pq/n)

=squareroot(p(1-p)/n)

=squareroot(0.70(1-0.70)/80)

=0.051