MAST10010 Lecture Notes - Lecture 1: Descriptive Statistics, Standard Deviation, Central Tendency
8 Sep 2018
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Document Summary
* statistics is a branch of mathematics dealing with the collection, organization, analysis, interpretation and presentation of data. * a collection of principles and procedures for gathering data & analysing information to help people make decisions when faces with uncertainty. * make inferences about the population the sample came from using knowledge or probability models for sample estimators. * all data sets obtained from a scientific study involve some degree of variability. * the job of the statistician is to determine what variability can be explained (real - can be attributed to some casual factor) and what is unexplained (noise random) Signal: what we are trying to figure out, to extract from the data it generally points us to the answer to our question. The variability in the sample data is encapsulated in the formula: data = signal + noise + dirt. Mistakes that we try to avoid and/or hope to remove.
