There is always a need for people to donate blood. College s…
There is always a need for people to donate blood. College students often volunteer when there are blood drives on campus. A survey is conducted to determine the percentage of students who have a negative blood type (O-, A-, B- or AB-) as they exit the bloodmobile. The 95% confidence interval for the percentage of students who reported a negative blood type is (12.4%, 17.7%). Complete parts a and b. a.) Interpret the meaning of this confidence interval using a complete sentence. b.) Use StatCrunch to find the sample size required to estimate the percentage of students who reported a negative blood type. Assume no prior studies were made and we need to be within an error of 3%.