Thursday 26 July 2012

PowerPoint 1: Data types and representation

When conducting an experiment, we collect data, usually in the form of quantitative variables that are measured or observed. These values we refer to as response variables.

Data will be either discrete or continuous. Discrete variables are obtained by counting. There are a finite, or countable number of choices available with discrete data. You can’t have 2.36 people present in the room for example.

Continuous variables are usually obtained by measuring. Length, mass, time – these are all examples of continuous variables. Since continuous variables are real numbers, we usually round them in other words, we put a boundary on the number of decimal places.


Learn more by opening up the following Google Slide Show
https://docs.google.com/open?id=0B45VdKkjuh89c1IzbDdqX0NzVEk

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