When testing the difference between two population means and the population variances are unknown and unequal, the degrees of freedom is calculated as 34.7. What degrees of freedom should be used to find the p-value of the test?
A) 34
B) 34.7
C) 35
D) None of these choices is correct.

Question

Quizplus · Accepted Answer

When the degrees of freedom are calculated as a decimal (34.7 in this case), you should always round down to the nearest whole number for the purpose of looking up or calculating the p-value. This is because statistical tables and software typically require the degrees of freedom to be a whole number.

When Testing the Difference Between Two Population Means and the Population