A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA is normally distributed, what proportion of cases would we find... Z score(s) Proportiona. less...

A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA is normally distributed, what proportion of cases would we find... Z score(s) Proportiona. less than 3.40?_______ ________b. less than 3.78?_______ ________c. more than 3.50?_______ ________d. more than 2.50?_______ ________e. between 2.00 and 3.00? _______ _______________f. between 3.00 and 3.50? _______ _______________