A Canadian researcher is interested in the effect of Zenatax, a new experimental drug for improving attention. To learn more about the effect of Zenatax on attention, the researcher recruited 15 healthy undergraduate students and randomly assigned them to 1 of 3 different conditions. Participants assigned to Conditions 1, 2, and 3 received 5mg, 10mg, and 15mg of Zenatax respectively. One hour after taking the drug, each participant was administered a standardized measure of attention with low scores reflecting distractibility and high scores indicating focus. The data are displayed in the table below.

6) A Canadian researcher is interested in the effect of Zenatax, a new experimental drug for improving attention. To learn more about the effect of Zenatax on attention, the researcher recruited 15 healthy undergraduate students and randomly assigned them to 1 of 3 different conditions. Participants assigned to Conditions 1, 2, and 3 received 5mg, 10mg, and 15mg of Zenatax respectively. One hour after taking the drug, each participant was administered a standardized measure of attention with low scores reflecting distractibility and high scores indicating focus. The data are displayed in the table below. 5mg 10mg 15mg 12 A WAJU 10 11 14 a) Does Zenatax have an effect on attention? (o = .05) (7 marks) b) According to the researcher's theory, individuals should definitely experience more focused attention after taking 15mg of the drug compared to individuals taking any other quantity. Does the contrast between the 15mg and 10mg group confirm the prediction of the theory? (a = .05)