The distribution of scores on the SAT test is approximately normal with μ = 500 and σ = 100. Draw a graph for each problem & shade the area that is desired. a. What proportion of the population have SAT scores above 650? b. What proportion of the population have SAT scores below 540? c. What is the minimum SAT score needed to be in the highest 20% of the population? d. What SAT score separates the top 60% from the rest of the distribution?
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