Scores on Professor Combs' Statistics Final Exams have a long
term history of being normally distributed, with a mean of μμ = 72
and a standard deviation of σσ = 9
a.) Find the probability that a single student
will score above a 77 on the Final exam.
b.) Find the probability that a single student
will score between a 67 and 77 on the Final exam.
c.) Find the probability that an entire class of
20 students will have a class average above a 77 on the exam.
d) Find the probability that an entire class of 20
students will have a class average between 67 and 77 on the Final
exam.
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