Question 1159832
sigma^2=5.76
sigma =2.4
want z of 30.22 which is (30.22-30.10)/2.4=0.12/2.4=0.05
and z of 35.5 which is (35.5-30.10)/2.4=5.4/2.4=2.25
probability of z between those two is 0.4678
or 2nd VARS 2 normalcdf (30.22,35.5,30.10,2.4) ENTER