A normal distribution has a mean of 63 and a standard deviation of 11.

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a. (1 mark) Compute the z-value associated with 55.

b. (1 mark) What percentage of the population is between 50 and 75?

c. (1 mark) What percentage of the population is less than 66?

d. (1 mark) What percentage of the population is more than 58?

e. (1 mark) What percentage of the population is less than 52 or greater than 78?

f. (1 mark) Below what value do 60% of the observations lie?

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