arnotrelle6080 arnotrelle6080
  • 13-07-2017
  • Mathematics
contestada

Given that the random variable x is normally distributed with a mean of 80 and a standard deviation of 10, p(85 < x < 90) is

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altavistard
altavistard altavistard
  • 14-07-2017
I'd do this by using the normalcdf probability distribution function on my TI-83 Plus calculator:  normalcdf(85,90,80,10).  Result:  0.1499.

You could also do this problem using z-scores.
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