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What is the proportion of the total area under the normal curve within plus or minus 2 standard deviations?
95%
What is the proportion of the total area under the normal curve within plus and minus two standard deviations of the mean?
95
The area under a normal curve with mu equals 8 and sigma equals 3 is?
The area under a normal curve with mu = 8 and sigma = 3 is
What is the area under standard normal distribution curve between z equals 0 and z equals -2.16?
2.16
What are the characteristics of a normal distribution curve?
Characteristics of a Normal Distribution1) Continuous Random Variable.2) Mound or Bell-shaped curve.3) The normal curve extends indefinitely in both directions, approaching, but never touching, the horizontal axis as it does so.4) Unimodal5) Mean = Median = Mode6) Symmetrical with respect to the meanThat is, 50% of the area (data) under the curve lies to the left ofthe mean and 50% of the area (data) under the curve liesto the right of the mean.7) (a) 68% of the area (data) under the curve is within onestandard deviation of the mean(b) 95% of the area (data) under the curve is within twostandard deviations of the mean(c) 99.7% of the area (data) under the curve is within threestandard deviations of the mean8) The total area under the normal curve is equal to 1.
