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The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200.
a.Nancy Bright's SAT score was 1390.What percentage of students have scores more than Nancy Bright?
b.What percentage of students score between 1100 and 1200?
c.What are the minimum and the maximum values of the middle 87.4% of the scores?
d.There were 165 students who scored above 1432.How many students took the SAT?
Reference Group
A group to which an individual or another group is compared, serving as a model for behaviour or beliefs.
Social Class
A division of society based on social and economic status, affecting people's opportunities, lifestyle, attitudes, and behavior.
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