6. Suppose a study about short-term memory is investigating the benefits of taking omega- 3 supplements and playing smartphone games that are designed to improve memory. 240 participants were randomly...

Extracted text: 6. Suppose a study about short-term memory is investigating the benefits of taking omega- 3 supplements and playing smartphone games that are designed to improve memory. 240 participants were randomly assigned to one of three different daily omega-3 supplement amounts (0 mg given as a placebo, 500 mg, or 1000 mg) and they were randomly assigned to either play a smartphone game daily or not. Before and after the treatments, participants were given evaluations to measure their short-term memory. a. Identify what the factor(s) are and the number of levels for each factor. b. How many total treatment groups are there in this study?