![]() Representative sampling assures that inferences and conclusions can reasonably extend from the sample to the population as a whole. When census data cannot be collected, statisticians collect data by developing specific experiment designs and survey samples. Statistics deals with every aspect of data, including the planning of data collection in terms of the design of surveys and experiments. Populations can be diverse groups of people or objects such as "all people living in a country" or "every atom composing a crystal". In applying statistics to a scientific, industrial, or social problem, it is conventional to begin with a statistical population or a statistical model to be studied. Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. Scatter plots are used in descriptive statistics to show the observed relationships between different variables, here using the Iris flower data set.
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