mean = (10+20+12+17+16)/5=15 standard deviation = 4 (based on the data) Z-score = (X-mean)/standard deviation Observed Value Z-score 10 (10-15)/4 =-1.25 20 (20-15)/4=1.25 12 (12-15)/4=-0.75 17 (17-15)/4=0.5 16 (16-15)/4=0.25 More test answers on https://studyhippo.com/ba275-assignment-1/