Get Standard Normal Cdf Table Background. This function calculates the cumulative density function of a normal random variable. A standard normal table, also called the unit normal table or z table, is a mathematical table for the values of φ, which are the values of the cumulative distribution function of the normal distribution.

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This calculator will compute the cumulative distribution function (cdf) for the normal distribution (i.e., the area under the normal distribution from negative infinity to x), given the upper limit of integration x, the mean, and the standard deviation. Standard normal table is used to find the probability that a statistic is observed below, above, or between values on the the standard normal distribution is used in various hypothesis testing procedures such as tests on single means, the difference between two means, and tests on proportions. Integrating the pdf, gives you the cumulative distribution function (cdf) which is a function that maps values to their.

This calculator will compute the cumulative distribution function (cdf) for the normal distribution (i.e., the area under the normal distribution from negative infinity to x), given the upper limit of integration x, the mean, and the standard deviation.

A normal distribution with mean of zero and standard deviation of one. The erf() function can be used to compute traditional statistical functions such as the cumulative standard normal distribution In other words, approximately 95% of the standard normal interval lies within two standard deviations, centered on a standard mean of zero. For example, the value for z=1.96 is p(z<1.96) =.9750.