Answer:
Explanation:
let m = mean
s= standard deviation
to find zscore = (value-m)/s
1.)
((m-1.5s)-m)/s = -1.5
in fact, if it's n standard deviations ABOVE the mean, your zscore is n
if it's n standard deviations BELOW the mean, your zscore is -n
2.)
((m+1.7s)-m)/s= 1.7
3.)
(m-m)/s= 0