What is the z-score of X, if n = 394, #mu= 42#, SD =11, and X =68?
1 Answer
Jun 18, 2016
#z=47.27#
Explanation:
Given -
#n=394#
#x=68#
#mu=42#
#sigma=11#
#SE=sigma/sqrtn=11/sqrt394=11/19.85=0.55#
#z=(x-mu)/(SE)=(68-42)/0.55=26/0.55=47.27#
