What is the z-score of sample X, if #n = 256, mu= 88, St. Dev. =128, and mu_X =96#?
1 Answer
Mar 11, 2016
#z=-1#
Explanation:
Given -
#n=256#
#mu=88#
#sigma=128#
#mu_x=96#
Find Standard Error
#SE=sigma/sqrt(n)=128/sqrt256=128/16=8#
Fidn the
#z=(mu-mu_x)/(SE)=(88-96)/8=-8/8=-1#
#z=-1#
