What is the percentage of the total area under the normal curve within plus and minus two standard deviations of the mea

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answerhappygod
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What is the percentage of the total area under the normal curve within plus and minus two standard deviations of the mea

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What is the percentage of the total area under the normal curvewithin plus and minus two standard deviations of the mean?
Select one:
a. 0.4772
b. 0.6826
c. 0.9974
d. 0.9544
e. 0.3413
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