QMS 102 Lecture Notes - Lecture 2: Chartjunk, Percentile, Covariance

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

Document Summary

Data collection: process of gathering information using questionnaires, interviews, experiments and field study: questionnaire (used in business world): containing sequences of questions to meet a research objective ex. How much time (in hours) do you usually spend studying per week?__ data: a collection of numbers and/or attributes of an entity (responses called data) Primary data: involves raw data (original data) that are collected directly from respondents (participants of a survey) using various instruments: i. e. interviews, surveys/questionnaires, observations and laboratory experiments. Or direct measurement of item of interest (measuring how much soft drink machine puts in each bottle) Secondary data: collected by another party or source (aka recycled data: ex. Variable: name chose to describe data collected: name identifies, value relates to data. Census: a set of data that includes all members of a population. Sample size: the number of items/persons in a sample (denoted as n) Population size: the number of items/persons in a population (denoted as n)