Question C.3: Find the area under the curve that is within two standard de...
Find the area under the curve that is within two standard deviations of the mean.
What the problems is asking for:
(C.3.1)
Appendix B Table A provides the right half of the area:
(C.3.2)
The shaded area is .4772.
To find the total area between ±z = 2, double the amount in the right half: 2(.4772) = .9544.
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