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Mathematics, 15.04.2021 23:30 joelhtx

A graduate student is interested in how viewing different kinds of scenery affects working memory. For his study, he selects a random sample of 49 adults. The subjects complete a test of working memory before and after walking in a nature setting. Before the walk, the mean score on the test of working memory was 9.4. After the walk, the mean score was 0.9 lower. The graduate student has no presupposed assumptions about how viewing different kinds of scenery affects working memory, so he formulates the null and alternative hypotheses as:

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