Each pair of graphs in Fig. 10.8 shows the distributions of a variable on two populations. Suppose
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Each pair of graphs in Fig. 10.8 shows the distributions of a variable on two populations. Suppose that, in each case, you want to perform a small-sample hypothesis test based on independent simple random samples to compare the means of the two populations.
In each case, decide whether the pooled t-test, nonpooled t-test, or neither should be used. Explain your answers.
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