Asked by Mat

The mean amount of money withdrawn from a bank ATM on a particular day was $120. If Lauren withdrew $80 and her z-score was -3.2, what was the standard deviation for the amount withdrawn that day?
Answered by Reiny
z-score = (given data - mean)/ sd
-3.2 = (80-120)/sd
-3.2sd = -40
sd = 12.5
There are no AI answers yet. The ability to request AI answers is coming soon!