One advantage of a matched subjects design is: Group of answer choices A. Individuals do not have to be randomly assigned. B. Everything is automatically counterbalanced. C. That error variance is decreased. D. There are no individual differences.

c

Step-by-step explanation:

A matched subject design makes use of different sets of  experimental groups for a treatment. then, each test subject in one group is matched with another equivalent subject in another group.

the advantage of this is that it reduces the error of variance

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6