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9. A study on the enhancing the effect of coffee on long-term memory found that 35 participants given 200 mg of caffeine performed better on a memory test 24 hours later compared to the placebo group that received no caffeine. {4 pts} a} There was a probability of 0.02 that the difference between the coffee group and the placebo group was due to chance. What can you conclude about the results of the study? Was it statistically significant? b} Another group was given a dose of 300 mg and performed better than the 200 mg group. There was a 0.?5 probability that this difference was due to chance. What can you conclude about the results of the 300 mg study? Was this statistically significant? 8 people have volunteered to participate in a study. A group of 3 will be selected from the 8 to receive a particular treatment. How many ways can the 3 people be selected from the group of 8? {3 pts}