A test is conducted to compare three different income tax software packages to determine whether there is any difference in the average time it takes to prepare income tax returns using the three different software packages. Ten different person's income tax returns are done by each of the three software packages and the time is recorded for each. Given this format and testing using an alpha level equal to 0.05, the critical value associated with the primary hypothesis test is:
A) 3.555
B) 2.456
C) 19.385
D) 4.256

Question

Quizplus · Accepted Answer

The test conducted is an ANOVA test to compare the means of three groups. With 2 and 27 degrees of freedom (3 groups and 30 total observations), the critical F-value at alpha = 0.05 is approximately 3.555.

A Test Is Conducted to Compare Three Different Income Tax