The CHISQ.INV.RT function in Google Sheets is utilized to determine the inverse of the right-tailed chi-squared distribution. This function is particularly beneficial in statistical analysis, as it allows users to find critical values for given levels of significance, which is essential in hypothesis testing and confidence interval calculations.

Syntax

CHISQ.INV.RT(probability, degrees_freedom)

• probability: A numeric value representing the probability for which you want the inverse chi-squared value.
• degrees_freedom: A numeric value that specifies the degrees of freedom associated with the distribution.

Example #1

CHISQ.INV.RT(0.05, 10)

Using this function call will return the chi-squared value that corresponds to a right-tailed probability of 0.05 with 10 degrees of freedom. For instance, the result could be approximately 18.307.

Example #2

CHISQ.INV.RT(0.01, 15)

This function computes the critical chi-squared value for a right-tail probability of 0.01 using 15 degrees of freedom. The output might be around 30.578.

Example #3

CHISQ.INV.RT(0.10, 5)

In this instance, the function evaluates the chi-squared value for a right-tailed probability of 0.10 with 5 degrees of freedom. The resulting value could be approximately 9.236.

Error handling

• NUM! This error occurs if the probability is less than 0 or greater than 1, or if the degrees_freedom is a negative value or zero.
• VALUE! This error arises when either argument is non-numeric or invalid, indicating that the inputs must be valid numbers.

Conclusion

In conclusion, the CHISQ.INV.RT function in Google Sheets is an invaluable tool for statisticians and researchers alike. By enabling easy access to critical chi-squared values, it facilitates more accurate hypothesis testing and reliability assessments in data analyses.