A nonforfeiture provision in a whole life policy that uses cash value to purchase term insurance equal to the existing amount of life insurance. 1  Suggest an improvement or addition to the Insurance and Risk Management Glossary. 2  Buy a print version of the Insurance and Risk Management Glossary.  Link to the Insurance and Risk Management Glossary.
Probability and the Normal Curve. The normal distribution is a continuous probability distribution. This has several implications for probability. 1  The total area under the normal curve is equal to 1.  The probability that a normal random variable X equals any particular value is 0.
In a normal distribution, 68.2% of all scores cluster around the mean within approximately 1 standard deviation, 95.4% within approximately 2 standard deviations, and 99.7% within approximately 3 standard deviations.