Question

On average, 8 eligble aaulits) ut of every 4 gives blood The standard deviation is 60, so in most samples of four eligiblo adulits, the number of adults who donate blood would dfmes trom the avorage umbor by no more than (Type megers or decimals rounded to the nearest hundredth as needed) Enter your answer in the edit fields and then click Check Answer

Need help with part D

Answer 1

$\textup{n = 4, p = 0.22}$

$\textup{Mean = n*p = 4 * 0.22 = \textbf{0.88} }$

$\textup{Standard deviation}= \sqrt{n*p*(1-p)} = \sqrt{4*0.22*0.78} = \textbf{0.828}$

On average 0.88 eligible adult(s) out of every 4 gives blood. The standard deviation is 0.828, so in most samples of four eligible adults, the number of adults who donate blood would differ from the average by no more than 0.