![]() ![]() Please enter the necessary parameter values, and then click Calculate. This calculator will tell you the cumulative area under the standard normal distribution, given a z-score (i.e., the cumulative probability from minus infinity to the z-score). This table gives a probability that a statistic is less than Z (i.e. Cumulative Area Under the Standard Normal Curve Calculator. Note that for z = 1, 2, 3, one obtains (after multiplying by 2 to account for the interval) the results f(z) = 0.6827, 0.9545, 0.9974, ![]() By using this website, you agree to our Cookie Policy. ![]() If X is a random variable from a normal distribution with mean μ and standard deviation σ, its Z-score may be calculated from X by subtracting μ and dividing by the standard deviation: Free Standard Normal Distribution Calculator - find the probability of Z using standard normal distribution step-by-step This website uses cookies to ensure you get the best experience. ![]()
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