A researcher wants to run a 2 * 3 mixed factorial design. The first factor is within-subjects. The second factor is between-subjects. If the researcher wants 20 observations per cell, which of the following is the correct number of participants he will need in total?

a) 20

b) 40

c) 60

d) 120

the answer is option c

c) 60

Step-by-step explanation:

From the given statement 2 * 3 mixed factorial design where 2 is a factor which is within the subject and

3 is the subject between the subject

then observation per cell where participants will need is 3 * 20 = 60 because 3 is the factor between the subject.