The US counts every resident every 10 years, or at least tries to. Statisticians use sampling from a population as an alternative to a complete count, as utilised at a potato chip factory.
We move beyond observational studies, like the one of marine life in the remote Line Islands, to designing experiments that manipulate various subject groups, as in the case of a medical study about osteoarthritis treatments.
This historical story describes how researchers untangled the relationship between smoking and lung cancer.
One city surveyed the happiness of its residents. Two-way tables help organise the data and tease out relationships between happiness levels and opinions about aspects of the city itself.
Twin studies track how similar identical and fraternal twins are on various characteristics, even if they don't grow up together. Correlation lets researchers put a number on it.
Winter snowpack in the Colorado Rockies can predict spring water supply. Plotting annual measurements in a scatter plot lets resource managers draw a regression line that helps them forecast water availability.
Plotting annual numbers of Florida powerboat registrations and manatee killings suggests an uncomfortable relationship for the marine mammals.
Production at Pete and Gerry's Organic Eggs provides a number of distributions that look normal - but are they?
Visit the Boston Beanstalks club for tall people. Height is normally distributed and we can use membership cut-offs and population data to calculate Z-scores.
A nature preserve that's tracked bird migrations through New England for decades records tons of bird-related data; everything from wingspan measurements to arrival dates provides examples of normal distributions.
How can we compare sales at two franchises in the Wahoo's restaurant chain? Standard deviation helps us quantify the variability in sales.
Using the example of hot dog calorie counts, we use boxplots to visualise the five-number summary and make comparisons between different types of frankfurters.
It's helpful to know the centre of a distribution - which is what the clerical workers in Colorado Springs found out in the 1980s when they campaigned for comparable wages for comparable work.
Meteorologists use histograms to map when lightning strikes and this visualisation technique helps them understand the data in new ways.
As a first step in visualising data, this film focuses on the use of stem plots to understand raw data. The US Army experienced an equipment shortage and as a result used statistics to ensure soldiers are properly outfitted for war. Data from soldiers' foot measurements and Toyota's fuel-efficient vehicles are transformed in stem plots.
Marcus du Sautoy inspects Leonardo da Vinci's original Vitruvian Man and discusses its application to architecture and geometry.
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