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Run statistical analyses quickly and directly in your browser. Choose the kind of calculator you want to use.

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

There are several types of two sample t tests and this calculator focuses on the three most common: unpaired, welch's, and paired t tests. Directions for using ...

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

This calculator is for 2x2 contingency tables that separate each subject into one of four categories based on two factors, each with two possibilities.

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

Prism, InStat or Statmate: · Web page: · Curve fitting book: · QuickCalc free web calculator:

GraphPad FAQs

Outliers make statistical analyses difficult. This calculator performs Grubbs' test, also called the ESD method (extreme studentized deviate), to determine ...

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

Analyze categorical data. Fisher's, Chi square, McNemar's, Sign test, CI of proportion, NNT (number needed to treat), kappa.

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

The GraphPad QuickCalc for determining the confidence interval of a proportion uses two different methods, and reports the results for both.

GraphPad FAQs

These choices are offered by GraphPad Prism and the GraphPad free web t test QuickCalc, as well as many other programs. The usefulness of the unequal ...

GraphPad FAQs

Prism (and InStat and QuickCalc) compute the confidence interval from the sample SD (that you entered or is computed from the data). The confidence interval ...

GraphPad FAQs

Prism and InStat (as well as QuickCalc since 5-April-2004) compute the two-sided P value using the method of summing small P values.

GraphPad FAQs