01:960:285 Study Guide - Fall 2018, Comprehensive Midterm Notes - Standard Deviation, Normal Distribution, Random Variable

• School: Rutgers University
• Department: Statistics and Biostatistic
• Course: 01:960:285
• Professor: Zhanyun Zhao

Document Summary

Population-set of experimental units that we study. Experimental unit- object upon which we collect data. Sample- subset of the population and only the population. Variable-a characteristic of an individual experimental unit. Inference-estimate or prediction about the total population based off of a sample of the population. Reliability- statement about the degree of uncertainty associated with a statistical inference. D2- one or more variables to be investigated. D3-tables, graphs, or numerical summary tools-how the information is presented. Inferential statistics: information predicted about the wider population based off the sample. I2- one or more variables to be investigated. I4- inference about the population based on sample information. Variable: 1= pepsi, 0 = coca-cola (d2,i2) Results from sample: 56% chose pepsi (d4) Reliability: 95% confidence level of the estimate is [53-59%] (i5) - as long as you have not observed the entire population, you cannot say anything based of the sample with. Inference:estimated that 56% of all cola consumers prefer pepsi(i4)