What is the z-score of sample X, if #n = 144, mu= 61, St. Dev. =12, and E[X] =62#?

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Answer 1 · 2016-11-14T12:38:54

The z-score #=1#

The z-score is given by

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

Here, #barx=62#

#mu=61#

#sigma =12#

#n=144#

The z-score #=(62-61)/(12/sqrt144)=1/1=1#