3 calculators in this category
- Normal Distribution Probability CalculatorGaussian (normal) distributionEnter a mean, a standard deviation and one or two bounds, and this calculator returns the area under the normal curve: the…
- Z Critical Value Calculator (Inverse Normal)Inverse standard normal (probit) functionThis calculator inverts the normal distribution: instead of turning a cut-off into a probability, it turns a probability into a…
- Binomial Distribution CalculatorBinomial distribution (Bernoulli trials)Enter the number of trials, the probability of success on each one, and the number of successes you care about, and this…
Which one do you need?
- Normal Distribution Probability Calculator
- Find normal-curve probabilities for any mean and standard deviation: the left tail, the right tail, the area between two bounds, plus z-scores and density.
- Z Critical Value Calculator (Inverse Normal)
- Get the critical z value for any confidence level or alpha, one- or two-tailed, and convert it into raw score cut-offs using your mean and standard deviation.
- Binomial Distribution Calculator
- Compute exact, cumulative and interval binomial probabilities for n trials at success probability p, with the mean, standard deviation and a full PMF table.
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