SOLUTION: The red blood cell counts (in millions of cells per microliter) for a population of adult males can be approximated by a normal distribution, with a mean of 5.9 million c
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-> SOLUTION: The red blood cell counts (in millions of cells per microliter) for a population of adult males can be approximated by a normal distribution, with a mean of 5.9 million c
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Question 1182256: The red blood cell counts (in millions of cells per microliter) for a population of adult males can be approximated by a normal distribution, with a mean of 5.9 million cells per microliter and a standard deviation of 0.4 million cells per microliter.
(a) What is the minimum red blood cell count that can be in the top 23% of counts?
(b) What is the maximum red blood cell count that can be in the bottom 14% of counts?
(a) The minimum red blood cell count is________
nothing million cells per microliter?
(Round to two decimal places as needed.)
You can put this solution on YOUR website! the 77th percentile for a normal distribution is z=+0.739
z=(x-mean)/sd
0.739=(x-5.9)/0.4
0.296=x-5.9
x=6.196 million
-
z(0.14)=-1.080
-1.080=(x-5.9)/0.4
-0.432=x-5.9
x=5.468 million
