Question 1095850
z=(x-mean)/sd
>(85-80)/20 which is z>.25
This is 0.4013
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>(70-80)/20 which is z>-0.5
This is 0.6915
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>(92-80)/20 which is z>+0.6
This is 0.2743
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>(64-80)/20 which is z>-0.8
This is 0.7881