Question

In a random sample of 250 people, 180 agree. Estimate the standard error. Round your answer to three decimal places. Standard error = Enter your answer; Standard error

Answer 1

Standard error = 0.028

Explanation:

Standard error of the mean = √x(N-x)/N3 = 0.028

Standard error is 0.028

If you need further answer, see below

α = (1-CL)/2 = 0.025

Standard normal deviate for α = Zα = 1.960

Proportion of positive results = P = x/N = 0.720

Lower bound = P - (Zα*SEM) = 0.664

Upper bound = P + (Zα*SEM) = 0.776

95% Confidence interval is 0.664 to 0.776