Homework Answers
12)
Answer)
Z score indicated the number of standard deviation away the given score from mean is
Z = (x - mean)/s.d
Given mean = 33
S.d = 12
Z = (69 - 33)/12
Z = 3
So, 69 is 3 standard deviation above the mean
13)
Mean = 17.7
S.d = 2.1
Z = (20.2 - 17.7)/2.1
Z = 1.19
No it is not unusual as it is not greater than 2 and not less than -2
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