Find the critical values for a 99% confidence interval using the chi-square distribution with 20 degrees of freedom.
A) 8.260, 37.566
B) 6.844, 38.582
C) 7.434, 39.997
D) 7.633, 36.191

Question

Quizplus · Accepted Answer

The critical values for a 99% confidence interval using the chi-square distribution with 20 degrees of freedom are found using a chi-square distribution table or calculator. For a 99% confidence interval, we need to find the values that cut off 0.5% from both tail ends of the distribution, leaving 99% in the middle. From the table, we find the critical values to be 7.434 and 39.997. Therefore, the best choice is C.

Find the Critical Values for a 99% Confidence Interval Using