The arthematic mean & SD of a certain normal distribution r 13.5 & 1.5.What value is exactly 2 SD less than the mean?
a)10.5
b)11
c)11.5
d)12
e)12.5
OA: a
a)10.5
b)11
c)11.5
d)12
e)12.5
OA: a
aM= 13.5
Sd= 1.5
2 Sd= 2 * 1.5 = 3
Exactly 2Sd less than the mean = 13.5 - 3 = 10.5
i.e A
i hope it helps.
