STA 100 Lecture 1: #1 Preliminary notes STAT 100
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9 26 18 in lecture preliminary lecture notes. I may not get to it all and i may add things this is why these notes are only preliminary notes. A final version and or corrections will be posted within 24 hours after lecture possibly with additions chapter. 3typesofevidencey x anecdotal observational study experiment u confounding randomization placebo effect placebo blinding single bind double blind population sample parameter statistic sampling error sampling bias. Anecdotalevidencee weakest evidence strongest evidence based on one or more individual cases called anecdotes s. Example deaf person recovers hearing after being struck by lightening. This is not compelling evidence that for deafness lightening is a cure why weak evidence case is not representative of larger groups notrepresentative other explanaitans difficult to reproduce notreproducible youhearthis story evidencebased on. 500 report taking vitamin c supplements during past year other 500 did not. Findings average colds in year vitamin c takers.
