monfils 418_independent t-test

Get a bunch of people with fevers give half of them

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Unformatted text preview: dent variable: the variable that you control –  dependent variable: the variable that depends on the experimental manipula$on (the one you measure) t Tests for Two Sample Means •  Example: Let’s ask whether or not Tylenol reduces fever - there are two ways you could do this… t Tests for Two Sample Means •  Example: Let’s ask whether or not Tylenol reduces fever - there are two ways you could do this… 1. Get a bunch of people with fevers, give half of them Tylenol and half of them a placebo and then measure their temperatures t Tests for Two Sample Means •  Example: Let’s ask whether or not Tylenol reduces fever - there are two ways you could do this… 1. Get a bunch of people with fevers, give half of them Tylenol and half of them a placebo and then measure their temperatures 2. Get a bunch of people with fevers, measure their temperatures, then give them Tylenol and measure them again t Test for Two Independent Sample Means •  OJen we have a situa$on in which repeated measures is inappropriate or impossible (e.g. any $me measuring the dependent variable once...
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