![]() In probability theory and statistics, the cumulative distribution function ( CDF) of a real-valued random variable X. JSTOR ( March 2010) ( Learn how and when to remove this template message)Ĭumulative distribution function for the exponential distribution Cumulative distribution function for the normal distribution.Unsourced material may be challenged and removed.įind sources: "Cumulative distribution function" – news For the standard normal distribution, 68 of the observations lie within 1 standard deviation of the mean 95 lie within two standard deviation of the mean and 99.9 lie within 3 standard. Since the entries in the Standard Normal Cumulative Probability Table represent the. You may see the notation (N(mu, sigma2)) where N signifies that the distribution is normal, (mu) is the mean, and (sigma2) is the variance. Please help improve this article by adding citations to reliable sources. The standard normal distribution is centered at zero and the degree to which a given measurement deviates from the mean is given by the standard deviation. A standard normal distribution has a mean of 0 and variance of 1. This article needs additional citations for verification. ![]()
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