psy 60 winter 2010 ch1 outline

psy 60 winter 2010 ch1 outline - Chapter 1 Picturing...

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Chapter 1 Picturing Distributions with Graphs Individuals and Variables Individuals – objects described by a set of data. (ex. People, animals, things) Variable – any characteristic of an individual. (can be diff. values) o Categorical variable – places an ind. Into one of several groups/ categories o Quantitative variable – takes numerical values w. a unit of measurement. Exploratory data analysis – using statistical tools and ideas to examine data & describe their main features. Distribution – tells what values it takes and how often it takes these values. Distribution of a categorical variable – lists the categories and gives either the count or the percent of ind. and who fall in each category. Roundoff error = NOT error. Pie chart – must include all the categories that make up a whole. Use only when you want to emphasize each category’s relation to the whole. Data has to be parts of a single whole
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This note was uploaded on 01/26/2010 for the course PSYC PSYC60 taught by Professor Rickard during the Winter '09 term at UCSD.

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psy 60 winter 2010 ch1 outline - Chapter 1 Picturing...

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