Biology 2244A/B Lecture Notes - Lecture 1: High-Heeled Footwear, Random Assignment, Dependent And Independent Variables
28 Feb 2017
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Decent sized sample why: it reduces error, better represents the population, lower chance of missing a group of people e. g. , minorities. Parameters of this population in the gettysburg address. Mu=4. 3, the parameter these statistics are trying to estimate. The mean of letters that our class got was about 5-6. Bias we systematically favoured the larger words than the smaller ones which lead to misleading results (overestimation) Definition: procedures for selecting units from the population: probability (uses chance) Each unit of the population has an equal chance of being selected. What if the sample of n=4 must come from the same row: each unit has a 1/3 chance, only 3 groups of n=4 have any chance. 2) stratified 3) cluster and 4) systematic are. 2) stratified sampling describe something that is unique. And only if you sample proportionality from strata. 4) systematic sampling: a starting point is randomly selected and then units are sampled at a constant interval.
