STAT 2040 Study Guide - Midterm Guide: Mutual Exclusivity, Menopause, Dependent And Independent Variables
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Test 1 (solutions to the white version: the colour of the rst page of this examination booklet (the cover sheet) is: White (a) white (b) yellow: a study surveyed 2,000 postmenopausal women. Consider the following statements: this is an experiment, not an observational study. It"s a survey (a type of observational study). This type of study can yield very strong evidence of a causal link between heart disease and hormone replacement therapy in post-menopausal women. Surveys do not yield very strong evidence of a causal link. False. (b) the probability of the intersection of two events can be greater than the probability of their union. False. (c) if p (a|b) = 1 then p (a b) = 1 false. (d) the sample mean is always greater than the sample variance. The 75th percentile, for example, is the *value of the variable* that has 75% of the observations to the left.
