Biology 2244A/B Chapter Notes - Chapter 1: Rainbow Trout, Insomnia, Stratified Sampling
29 Nov 2013
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Chapter 1 introduction (sampling and study design) Data observations (measurements, genders, survey responses) that have been collected. Statistics a collection of methods for planning experiments, obtaining data and then organizing, summarizing, analyzing, interpreting, presenting and drawing conclusions based on data. Population complete collection of all elements (scores, people, measurements) to be studied. The collection is complete in that it includes all subjects to be studied. Census the collection of data from every member of the population. Sample a subcollection of members selected from part of a population. Example: a poll asked 1000 adults a question. 1000 survey subjects constitute a sample, whereas the population would be all 202 million americans. Every 10 years the government attempts a census of every citizen but that is almost impossible. Note: it is extremely important to obtain sample data that is representative of the population from which data are drawn. Parameter a measurement describing some characteristic of a population.
