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According to a study conducted by a statistical organization, the proportion of Americans who are satisfied...

According to a study conducted by a statistical organization, the proportion of Americans who are satisfied with the way things are going in their lives is 0.66.

Suppose that a random sample of 205 Americans is obtained,

a. About 69% of the samples will contain more than x Americans who are satisfied with their lives. Find the x.

b. What is the probability that at least 140 Americans in the sample are satisfied with their lives?

c. What is the probability that 157 or fewer Americans in the sample are satisfied with their lives?

Math   Statistics-And-Probability   
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