p value calculator

Distributions: Normal, T, Chi-Square, F

Normal Distribution
P-value is the probability to get the current statistic result under the assumption that H0 is correct.
If you decide to reject the H0, P-value is the probablity of type I error - rejecting a correct H0. A common used rule define a significant level of 0.05, when p-value is smaller than the significant level it is assumed that you can reject the H0 with a small chance of error. Other commonly used significant level is 0.01.

If you know the statistic value, choose the relevant distribution otherwise press the above relevant button
digits: example digits=2: (0.001234 => 0.0012)
statistic: the test statistic value
μ: mean(average)
σ: standard deviation
dfnumerator: numerator degrees of freedom
dfdenominator denominatior degrees of freedom
Normal Distribution