Statistical Sciences 1023A/B Study Guide - Midterm Guide: Esophageal Cancer, Nicotine Patch, Randomized Experiment
19 Apr 2013
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Unit 1: benefits and risks of using statistics. A collection of procedures and principles for gaining and analyzing information in order to help people make decisions when faced with uncertainty. Heat or hypothalamus case study: left vs. right, survival nature of tendencies. Newborn infants are soothed by the sound of the normal adult heartbeat. Hypothesis: men have lower pulsing rate than women. To conduct a statistical study properly, one must: get a representative sample. Researchers constrained to convenience samples : get a large enough sample. The more diverse or variable the individuals, the larger the sample necessary: decide whether the study should be an observational study or a randomized experiment. When we are merely observing things about our sample, it"s an observational study. Randomized experiment: people randomly assigned to one of two groups. Placebo pills to not influence people with expectations. Aspirin prevents heart attacks study: aspirin does indeed prevents h. a. "s 55% as likely.
