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Use this calculator to compute a two-tailed P value from any Z score, T score, F statistic, correlation coefficient (R), or chi-square value.

https://www.graphpad.com/quickcalcs/pvalue1/

Performs unpaired t test, Weldh's t test (doesn't assume equal variances) and paired t test. Calculates exact P value and 95% confidence interval.

https://www.graphpad.com/quickcalcs/ttest1/

This calculator assumes a P value significance threshold of 0.05. The biggest mistake researchers make when interpreting contingency tables is assuming that ...

https://www.graphpad.com/quickcalcs/contingency1/

The test statistic corresponds to a p-value that represents the likelihood of seeing that outlier assuming the underlying data is Gaussian. Grubbs' Test. Read ...

https://www.graphpad.com/quickcalcs/grubbs1/

Choose the kind of calculator you want to use. Categorical data. Fisher's ... Correct a P value for multiple comparisons and Bayes. Random numbers. Assign ...

https://www.graphpad.com/quickcalcs/

... value of a response variable based on a value of the predictor variable. The ... P-values help with interpretation here: If it is smaller than some ...

https://www.graphpad.com/quickcalcs/linear1/

Statistical Ratio Calculator. Use this calculator to compute a Z, t, F, or chi-square value from a probability.

https://www.graphpad.com/quickcalcs/statratio1/

This calculator compares observed and expected frequencies ... The chi-square p value tests if the observed counts are consistent with the expected counts.

https://www.graphpad.com/quickcalcs/chisquared1/

Question 2: The calculator also computes the "P-equals case". This is not ... P value equal to the P value you obtained is a false positive. Question 3 ...

GraphPad FAQs

when making a single confidence interval, t* is the value of the t ratio that corresponds to a two-tailed P value of 0.05 (or whatever significance level you ...

GraphPad FAQs