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ALLENGE ACTIVITY 8.1.2: Hypothesis testing for two population means (right-tailed t-test) Jump to level 1 A maker of dietary supplements would like to claim that a new supplement increases performance on an IQ test IQ tests are administered to a simple random sample of people taking the supplement as a treatment and a control group. The results of the study are below. Control Treatment Mean 103.929 104.154 What are the population parameters? Variance 198.533 52.474 Observations 13 Pick Hypothesized Mean Difference O 20 Is the two-sample hypothesis test a paired t-test or an unpaired t-test? t Stat 0.053 P(T t Critical one-tail 1.725 P(T What conclusion can be drawn from the data? Pick evidence exists to support the claim that the mean score of the supplement group is higher than the control group