Twelve percent of people in a city eligible to donate blood actually do. You randomly select four eligible blood donors and ask them if they donate blood. Complete parts? (a) through? (d) below.
A. Find the mean of the binomial distribution. (round to nearest hundredth as needed)
B. Find the variance of the binomial distribution. (round to nearest hundredth as needed)
C. Find the standard deviation of the binomial distribution. (round to the nearest hundredth as needed)
D. On? average_ ,eligible? adult(s) out of every 4 gives blood. The standard deviation is?_, so in most samples of four eligible? adults, the number of adults who donate blood would differ from the average number by no more than _. (round to the nearest hundredth as needed)