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Data are from a normal distribution with a mean of 5 and a standard deviation of...

Data are from a normal distribution with a mean of 5 and a standard deviation of 2.5.

  1. What % of observations are positive?
  2. What % of observations are negative?
Math   Statistics-And-Probability   
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Answer #1

Let r.v. X has the mean 5 and standard deviation 2.5 and X follows normal distribution.

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