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This calculator compares observed and expected frequencies within (up to 20) categories using the chi-square test.

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

A free GraphPad QuickCalc does the work for you. Interpreting the CI of the SD is straightforward. If you assume that your data were randomly and ...

GraphPad FAQs

The calculators on this page are independent and can be used in any order. The calculators are numbered because sometimes the results of one calculator are used ...

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

McNemar's test is used to compare paired proportions. It can be used to analyze retrospective case-control studies, where each case is matched to a particular ...

https://www.graphpad.com/quickcalcs/mcnemar1/

Divide the difference computed in step 1 by the pooled standard error value computed in step 3. The result is the t ratio. Look up (or use the free QuickCalc) ...

GraphPad FAQs

You can use the free GraphPad Quickcalc to compute the exact P value. Or use this Excel formula: =FDIST(15.76,3,12). The P value is 0.000183, which Prism ...

GraphPad FAQs

This calculator will calculate the mean, SD, SEM and confidence interval of the mean. Enter mean, N and SD or SEM, and it will calculate the confidence ...

https://www.graphpad.com/quickcalcs/cimean1/

The QuickCalc outlier calculator uses the method documented in this page from the NIST. They use the variable G instead of the variable Z used above. The ...

GraphPad FAQs

At this time, we do not plan to implement Bernard's test into GraphPad Prism, InStat or our free QuickCalc web calculators. There certainly does not seem to ...

GraphPad FAQs

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

GraphPad FAQs