Hypothesis Tests: Two Related Samples. Related Samples. The same participants give us data on two measures e. g. Before and After treatment Aggressive responses before video and aggressive responses after With related samples, someone high on one measure is probably high on other. Cont.
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Hypothesis Tests: Two Related Samples
D and sD = mean and standard deviation of differences.
df = n - 1 = 9 - 1 = 8
t(4) = 1.236, p > .05.
Do not reject null hypothesis
Sample came from population in which mean difference score = 0
IQ scores after taking the pill (M = 102.4) were not significantly higher than IQ scores before taking the pill (M = 99.4), t(4) = 1.24, p > .05.