Question 703222
z = (x - mu)/(sigma)


z = z-score
x = score given
mu = mean (average)
sigma = standard deviation = sqrt(variance)




z = (24 - 34)/5 = -2 (standard deviations from the mean)


less than 23: 2.5%


greater than 23: 97.5%


*[illustration normal_dist.png]