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According to the American Red Cross blood facts and statistics website, the blood type most often...

According to the American Red Cross blood facts and statistics website, the blood type most often requested by hospitals is Type O. A nursing student wants to estimate the true proportion of students who have blood type O. From a random sample of 100 students, 46 were found to have type O blood.

A. In the calculation of a 98% confidence interval for the true proportion of students who have blood type O, what is the margin margin of error? Use 3 decimal places.

B. Interpret the confidence LEVEL of 98%

C. How large of a sample is needed to estimate the true proportion of students who have blood type O to within 0.06 with a 98% level of confidence?

Math   Statistics-And-Probability   
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