P R 309 Study Guide - Final Guide: Level Of Measurement, Collectively Exhaustive Events, Sample Size Determination
Document Summary
Questions to consider: if you asked a sample of 1000 people in a city which brand of coke they preferred, and 60% said brand a . Larger sample size increase confidence in population estimates and generalizations. Number of contacts must therefore be higher than desired final sample size. Required number of contacts formul a = dss/(atp * cs) Measurement : four levels of measurement and order of measurements from low to high. Nominal measurement - what is nominal data. Categories in nominal measurement are mutually exclusive and collectively exhaustive. For purposes of data analysis, numbers are assigned to each category of response. Numbers have no meaning besides what they are assigned to. Ordinal measurement - what is ordinal data. Rank or order, ex: class level, grade level, placement. Provide insights into the relative standing of ordered characteristics. Cannot provide any insights into the relative distance between ranked objects.
