The GPA\'s of a large population of college students are approximately normally distributed with mean 2.6 and variance 3.6. What fraction of the students will possess a GPA in between 2.2 and 3.4? Solution z1=-.4/1.87=-.21 z2=.42 P( GPA in between 2.2 and 3.4)=.66-.41=.25.