Question

Suppose a package delivery company purchased 14 trucks at the same time. Five trucks were purchased from manufacturer A, four from B and five from manufacturer C. The cost of maintaining each truck was recorded. The company used ANOVA to test if the mean maintenance cost of the trucks from each manufacturer were equal. To apply the F test, how many degrees of freedom are in the denominator?
a)2
b)3
c)11
d)14

Answer 1

Using it's concept, it is found that the number of degrees of freedom in the denominator is given by:

• c) 11

The amount of degrees of freedom in the denominator is the sum of one less than each sample size.

In this problem, there are samples of 5, 4 and 5, hence:

$df = 4 + 3 + 4 = 11$

There are 11 df on the denominator, hence option c is correct.

To learn more about degrees of freedom in the denominator, you can take a look at https://brainly.com/question/14124438