SOLUTION: Among persons donating blood to a clinic 80% have Rh+ .A sample of 15 people who donate blood at the clinic on a particular day. ---Find the mean and the standard deviation of the

SOLUTION: Among persons donating blood to a clinic 80% have Rh+ .A sample of 15 people who donate blood at the clinic on a particular day. ---Find the mean and the standard deviation of the

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Question 1158050: Among persons donating blood to a clinic 80% have Rh+ .A sample of 15 people who donate blood at the clinic on a particular day.
---Find the mean and the standard deviation of the number of people with Rh+
• Mean=
• Standard deviation =

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
mean is np=15*0.8=12 people, expected value
variance is np(1-p) or 12*0.15=1.8
sd is sqrt (V)= sqrt (1.8)=1.34
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