A researcher finds that the mean value of depression = 15, and the variance = 9. Which Depression Score corresponds to a z-score of +1?
Given :-
Mean () = 15
Variance () = 9
standard deviation. () =
=
= 3
Let, z-score is z=1
Therefore,
z =
=> x = + (z*
)
=> x = 15 + (1*3)
x = 18
Answer :- Depression score is 18.
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