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A survey was conducted at a local high school to determine the number of hours that a student studied for the final Math504 exam. To achieve a normal distribution, 325 students were surveyed. The results showed that the mean number of hours spent studying was 4.6 hours with a standard deviation of 1.2 hours.

a) Draw a normal curve showing all the values (hours studying) at Z1, Z2, Z3

b) How many students studied between 2.2 hours and 7 hours?

c) What percentage of the students studied for more than 5.8 hours?

d) Harry noticed that he scored a mark of 60 on the Math504 exam but studied ½ hour. Is Harry a typical student?

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