Chi-square is a statistical test performed to determine the difference between the observed and the expected data under the specific hypothesis. Make use of this simple online statistic Probability value calculator to compute the chi squared test P value. Chi Square Calculator for 2x2 This simple chi-square calculator tests for association between two categorical variables - for example, sex (males and females) and smoking habit (smoker and non-smoker). Chi-Square Score to P Value Calculator. Statology is a site that makes learning statistics easy by explaining topics in simple and straightforward ways.

Easy Chi-square Calculator Google

Chi-Square Calculator. The results are in! And the groups have different numbers. But is that just random chance? Or have you found something significant? The Chi-Square Test gives us a 'p' value to help us decide. ICalcu- four statistics calculators: Five-number summary, ANOVA and Tukey HSD, Chi-square and Binomial Probability. They are extremely easy to use, with intuitive examples included. They are extremely easy to use, with intuitive examples included.

To view the graph of the χ² distribution for your calculated values, click on the show graph button after doing the calculation.

Compute the p-value for a chi-square distribution

Recommended reading

• Handbook of Mathematical Functionsby Milton Abramowitz and Irene Stegun
• Numerical Recipes in Cby William H. Press, Flannery,Teukolsky and Vetterling
• Schaum's Easy Outline of Probability and Statisticsby John Schiller, A. Srinivasan and Murray Spiegel

Affiliate disclosure: we get a small commission for purchases made through the above links

The p-value is the area under the chi-square probability density function (pdf) curve to the right of the specified χ² value.In Excel: p = CHIDIST(χ2,ν).

See Chi-square formulae for more details of the mathematics.

Compute the inverse of the p-value for a chi-square distribution

This is the value of χ² that will give the specified p-value for the chi-square distribution.In Excel: χ² = CHIINV(p,ν).

Table of selected percentiles

See a table of selected percentiles of the chi-square distribution computed using the Javascript calculation engine behind this page.This is the usual table we see in textbooks.You can see a comparison of our results with those given by Excel.

Other statistical calculators

See our Binomial distribution calculator which calculates a table of the binomial distribution for given parameters and displays graphs of the distribution function, f(x), and cumulative distribution function, F(x).

References

• [1] Abramowitz, M. and IA Stegun,Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables,National Bureau of Standards, Applied Mathematics Series 55, Tenth Printing, 1972.
• [2] Menezes, AJ, PC van Oorschot and SA Vanstone,Handbook of Applied Cryptography,CRC Press LLC, 1997.
• [3]NIST/SEMATECH. e-Handbook of Statistical Methods, http://www.itl.nist.gov/div898/handbook/(accessed January 2013).
• [4]Press, WH, SA Teukolsky, WT Vetterling and BP Flannery,Numerical Recipes in C: The Art of Scientific Computing, Second Edition,Cambridge University Press, 1992.
• [5]Spiegel, MR, J Schiller, RA Srinivasan,Schaum's Easy Outline of Probability and Statistics,McGraw-Hill, 2001.

Acknowledgements

How To Calculate Chi Square With Ti 84

Many thanks to Phil O'Sullivan, statistician extraordinaire, for his help and advice on this subject.

Contact us

To comment or provide feedback on this page, please send us a message.

Easy Chi-square Calculator Free

This page last updated 21 June 2020.