Ronda would like to assess the effects of a reading comprehension course on the scores of students. she gives a group of remedial students a reading comprehension pretest and then randomly assigns them to either the treatment group or the control group. shortly after the treatment, she measures their reading comprehension scores again. what kind of research design did ronda use?

Data for hermann corporation are shown below: per unit percent of sales selling price $ 125 100 % variable expenses 80 64 contribution margin $ 45 36 % fixed expenses are $85,000 per month and the company is selling 2,700 units per month. required: 1-a. how much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,000 and monthly sales increase by $20,000? 1-b. should the advertising budget be increased?