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1. The blood center is interested in determining which gender - males or females - is...

1. The blood center is interested in determining which gender - males or females - is more likely to respond to a call to give blood. Random, independent samples of 68 females and 87 males were each asked if they would be willing to give blood when called by a local hospital. Suppose 32 of the females and 44 of the males responded that they were. Find the margin of error for a 90% confidence interval that would be used to estimate the difference between the proportion of the females and males who are willing to donate blood

2. Find the margin of error E for a 97% confidence interval for (p1 − p2),
given that n1 = 106, n2 = 706, x1 = 71, and x2 = 272

Round your answer to three decimal places.

Math   Statistics-And-Probability   
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