data analysis

When letters count in a table

A common task analysts are often faced with is to establish whether there are any relationships between variables and, if there is a, what is the nature of the relationship.

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Story of a Pie

You may not know this but this year is the 217th birthday of the humble pie chart. Its first known, and purposeful, application was the visualisation of the geographical...

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Three ways to perceive reliability

When measuring a phenomenon, you need to select the right tool. To measure temperature, you use a thermometer; alcohol content in breath is measured with an alcometer; and weight,...

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Trees that grow from tables

When stepping outside the domain of distributive and descriptive statistics for individual variables, we usually take interest in correlations between variables.

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Weights and Tables

When creating a table, you can present weighted or unweighted data. As usual, the answer depends on the situation. You will get my meaning in a minute, but first, let me explain...

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Cross-selling and tables

What combination of products frequently end up in a shopper's basket? What services are usually bought together by consumers?

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