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

Answer:0.051

Step-by-step 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