Chi-Square distribution is used for a normally distributed population.

Let Z1, Z2,....Zn be independent standard random variables.

Let X= [Z12+ Z22+....+Zn2].

X distribute as Chi-square random variable with n degrees of freedom.

Enter input data and then press "Calculate" button to get the results

df: | degrees of freedom | |

choose X or P(x≤X) |