ADMS 2320 Study Guide - Final Guide: Simple Random Sample, Binomial Distribution, Average Absolute Deviation

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Chapter 1: what is statistic: statistics is a way to get information from data. Data statistics information: a population is the group of all items of interest to a statistics practitioner. All york students: parameter a descriptive measure of a population (mean, proportion, etc, a sample is a set of data drawn from population. Our confidential level is 95% (19/20 =0. 95), while our significance level is 5%. Student grades ( x, y, z : the values of the variable are the possible values for a variable. Student marks (0 - 100: data are the observed values of a variable. 1, fair good = 2, good = 3, very good = 4, excellent = 3, etc: data not categorical interval ( real number; all calculation; treated as ordinal or nominal) Categorical order ordinal (ranked order; calculation only based on ordering process; May be treated as nominal but not interval)

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