When data is normally distributed, approximately 95% of the data falls within ________ standard deviations of the mean.

  • Four
  • One
  • Three
  • Two
When data is normally distributed, approximately "95%" of the data falls within "Two" standard deviations of the mean. This is known as the empirical rule, or the 68-95-99.7 rule, a shorthand used to remember the percentage of values that lie within a band around the mean in a normal distribution.
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