2. In a college stats class, 230 students took a test. The test scores are normally distributed with an average of 72% and
a standard deviation of 13%.
a. What percentage of students scored a B (80%) or better?
c. How many students failed the test (a score of less than 60%)?
d. Jermaine scored a 95% on the test. What is his z-score?
e. Jermaine's friend Bret earned a z-score of -1.35 on the test. Did he pass? What is his percentage score?
f. Between what two scores did the middle 68% of students score?