If n=22, ¯ x x ¯ (x-bar)=35, and s=6, find the margin of error at a 99% confidence level (use at least three decimal places)

Answer 1

margin of error = t-critical * standard deviation/square root sample size

t-critical for 21 DOF and tail alpha = 0.005 = 2.831

standard deviation given as 6

sample size given as 22.

plug in those numbers in the margin of error equation.