QMS 102 Lecture Notes - Lecture 1: Ryerson University, Descriptive Statistics, Level Of Measurement

• School: Ryerson University
• Department: Quantitative Methods
• Course: QMS 102
• Professor: Nursel Ruzgar

Document Summary

Statistics is a way to get information from data. Population: a group of all items of interest to the statistics practitioner. All the members of the ryerson university. Parameter: a descriptive measure of a population. Mean number of soft drinks sold at ryerson every week. Sample: a set of items drawn from the population. Statistic: a descriptive measure of a sample. Average number of soft drinks these students buy per week. Variable: a characteristic of population or sample that is of interest for us. Number of soft drinks a student buys every week. Involves the arrangement, summary, and presentation of data, to enable meaningful interpretation, and to support decision making. Fall 2016: the actual method used depends on what information we would like to extract. Inferential statistics: a set of methods used to draw conclusions about characteristics of a population based on sample data.