Consider a normal population with 50 and 49 Calculate the

Consider a normal population with = 50 and = 4.9. Calculate the z-score for an x of 46.2 from a sample of size 20. (Give your answer correct to two decimal places.)

Solution

z = ( x - ) / (/sqrt(n))

= ( 46.2 - 50)/(4.9/sqrt(20))

= -3.47 Answer