Information on the occupational prestige scores for blacks and whites are presented in the following table.

a. What percentage of whites should have occupational prestige scores above 60? How many whites in the sample should have occupational prestige scores above 60?
b. What percentage of blacks should have occupational prestige scores above 60? How many blacks should have occupational prestige scores above 60?
c. What proportion of whites have prestige scores between 30 and 70? How many whites have prestige scores between 30 and 70?
d. How many blacks in the sample should have an occupational prestige score between 30 and 60?

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Mean 45.03 40.83 Standard Deviation 13.93 13.07 Whites 1,100 Blacks 195