What is the z-score of sample X, if #n = 169, mu= 33, St. Dev. =39, and E[X] =37#?

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Answer 1 · 2016-11-30T14:48:47

The z-score is #=1.33#

The z-score of a sample mean is

#z=(barx-mu)/(sigma/sqrtn)#

Here.

#barx=E [X]=37 #

#mu=33#

#sigma=39#

#n=169#

#z=(37-33)/(39/sqrt169)#

#=4/(39/13)=4/3=1.33#

Hope this wil help!