SOLUTION: Statistics question 15:
A normal distribution has a Mew μ =80 and standard deviation σ = 20.
Find the following proportions:
p(X>85)
p(X>70)
p(X>92)
p(X>64
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Question 1095850: Statistics question 15:
A normal distribution has a Mew μ =80 and standard deviation σ = 20.
Find the following proportions:
p(X>85)
p(X>70)
p(X>92)
p(X>64)15
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
>(85-80)/20 which is z>.25
This is 0.4013
---------------
>(70-80)/20 which is z>-0.5
This is 0.6915
--------------
>(92-80)/20 which is z>+0.6
This is 0.2743
-------------
>(64-80)/20 which is z>-0.8
This is 0.7881
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