Question

Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. Z=-1.18
Was wondering for help with these, im having trouble figuring out how to find the z-score.

Answer 1

baie . Noomal disth is symmet 1 PLZ -1.18) 1221.18) = 0. 88lo 22-1.18 SP 1-0.98< zc1.21) ( 221.21) -Plz 2.0.98) 0.8869 -0.1635 0.7234 -6.98 1:21 2 3 10.1736 1/2<z) 20.1736 from normal tables PLZ -0.94) = 0.1736 _ .'. Z = -0.94 10.9177 P(222) = 0.9177 from normal tables PL 27-1.39)=0.9177 - :2 = -1.39