Question: For a normal distribution with a mean of = 80 and a standard deviation of = 20, find the proportion of the population

For a normal distribution with a mean of μ = 80 and a standard deviation of σ = 20, find the proportion of the population corresponding to each of the following scores.

a. Scores greater than 85.

b. Scores less than 100.

c. Scores between 70 and 90?

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