Standard Normal Curves
A standard normal curve has two inflection points where it changes concavity.
If represents the area contained beneath the curve, above the -axis, and in between the two inflection points, find
I'm thinking of building out a non-combinatorial Statistics section on Brilliant over summer once I finish my AP stats course. What do you guys think about that? Leave a comment on how you feel in this problem's discussion.
The answer is 68.
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1 solution
Inflection points occur when z = 1 . Using the 68-95-99.7 rule, the area contained by P ( 1 > z > − 1 ) = . 6 8