A researcher is interested in testing whether chocolate causes hyperactivity in children. To test this hypothesis, researcher recruits 16 children, gives these children chocolate, and measures their level of activity. A researcher obtains a sample mean of M = 102, with a SS = 375. The researcher finds out that the average activity level among the population is µ = 100, but is unable to find out the population standard deviation. Does the research have enough evidence to support the hypothesis that sugar causes hyperactivity among children? Use two-tailed test with alpha α=.05 What is the effect size  (r2) ?

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