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The correlation problem

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H.M.: the man with no memory

Levels of measurement

Before analysing data, you need to know what type of data you have. The types of data that are needed for the exam are nominal, ordinal and interval.

This means placing your data into categories and then counting the frequency in each category.

For example, my daily 11 a.m. snacks can be categorised into the following food types: fruit, cakes, nuts and energy bars. I then count how many would be in each of these categories and represent the data in this way — perhaps as a pie chart or bar graph.

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Previous

The correlation problem

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H.M.: the man with no memory

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