Question

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?

Answer #1

The American Red Cross says that about 45% of the U.S.
population has Type O blood, 40% Type A, 11% Type B, and 4% Type
AB. Suppose we select 5 blood donors at random.
What is the probability that the fifth donor is the first donor
with Type O blood?
What is the probability exactly two of the five donors will
have Type O blood?
What is the probability none of the five donors will have Type
O blood?
What...

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During a blood-donor program conducted during finals week for
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to three places after the decimal. A 95% confidence interval for
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You want to estimate the proportion of American voters who are
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Total plasma volume is important in determining the required
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