Suppose a package delivery company purchased 17 trucks at the same time. six trucks were purchased from manufacturer a, five from manufacturer b, and six 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 must be in the denominator?

17

4

3

14

.

Step-by-step explanation:

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".  

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"  

If we assume that we have groups (A,B,C) and on each group we have sample of size (6,5,6) respectively , on each group we can define the following formulas of variation:  

And we have this property  

The degrees of freedom for the numerator on this case is given by where k =3 represent the number of groups.

The degrees of freedom for the denominator on this case is given by .

And the total degrees of freedom would be

On this case the correct answer would be 2 for the numerator and 14 for the denominator.  

Best answer

14

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.