Question 1187950
z(0.09)=-1.34
z(0.19)=-0.88
z(0.75)=0.67
z=(x-mean)/sd
for the first one
-1.34=(x-2254)/573.6; multiply both sides by 573.6
-768.62 or -769=x-2254
x=1485 kWh
The other two are done exactly the same way. The last one will be greater than 2254.