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Standard Normal Distribution

Standard Normal Distribution

Author: Bob Kibler
  • Be able to find the standardized score of value given the mean and standard deviation
  • Find the area under a normal curve given the standardized value
  • Find the standardized value given the area under a normal curve
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Z-Score Review

Z-score Notes


Standard Normal Distribution

Standard Normal Distribution Notes


Do I get it?

"Do I get it" - Solutions

1) All values above the mean have a positive z-score

2)  (87-82) / 5 = +1.00

3) x = (-0.8)(2.5) + 67.5 =

         65.5 inches

Use NORMALCDF for #4 and #5

4) Lower = -1.24     Upper = 0.98     Area under the curve = 0.729

5) Lower = -0.73     Upper = 1E99 (infinity)     Area under the curve = 0.767