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checkitout checkitout
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6 years ago
With symmetric, bell-shaped distributions, approximately what percent of the observations are within two standard deviations of the mean?
 a. 50
  b. 68
  c. 95
  d. 99.7
  e. 100
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cedd123cedd123
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checkitout Author
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6 years ago
You make an excellent tutor!
Shuqin
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Yesterday
Helped a lot
macbookpro1
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2 hours ago
Brilliant ツ
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