- #1

habman_6

- 16

- 0

A) -270; 198

B) -571; 198

C) -270; 988

D) -571; 988

E) none of the other answers displayed

I can get the mean (-571), but for the standard deviation, I only get the answer (apparently 198) when I use the formula:

sigma² _ new = b * sigma²_old

When the formula SHOULD use b², instead of just b.

(Im using sigma² = Sum((x_i-u)²*p) to get the original variance.)