Use the following example to address questions 1-10:

A consumer is interested in comparing gas mileage between three different car manufacturers. The researcher finds data at fueleconomy.gov and uses this to compare cars from 3 different manufacturers with the data presented below:

A	B	C
22	23	26
24	26	33
31	30	36
28	29	35
27	25	32

In this example the number of factors (k) being studied is:

Select one:

a. 10

b. 5

c. 15

d. 3