Question 1153705
z=(x-mean)/sd or (1500-1518)/325=-0.056
probability z<-0.056=0.4777
greater than 2000 would be z>500/325=z>1.54  This has probability of 0.0618

2.5 sds away is probability of 0.9876
This would be scores of 650 away from the mean or between 868 and 2168.