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Suppose in a survey of 900 randomly selected student, 432 said they favored chocolate ice cream....

Suppose in a survey of 900 randomly selected student, 432 said they favored chocolate ice cream.

A. Find a 90% confidence interval for the proportion of students who favor chocolate ice cream.

B. What sample size is needed if we want 90% confidence with a margin of error of 1%?

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Math   Statistics-And-Probability   
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