22 patients in a treatment group who were eating while playing solitaire were asked to do a serial-order recall of the food lunch items they ate. The average number of items recalled by the patients in this group was 4. 9 with a standard deviation of 1.8. The average number of items recalled by the patients in the control group (no distraction) was 6.1, with a standard deviation of 1.8.
Do these data provide strong evidence that the average number of food items recalled by the patients in the treatment and control groups are different?
