One thing that the Covid-19 Pandemic has done is to introduce the science of data to many more people than ever before. We listen out for numbers every day and worry when they increase. Expressions such as "flattening the curve" and terms such as the "R number" are now part of our vocabulary, Today I heard a new term - the Gompertz Curve!
The Gompertz Curve is a type of mathematical model for a time series analysis, and is named after Benjamin Gompertz (1779–1865) who was a British mathematician. According to Wikipedia, the Gompertz Curve is a "sigmoid function which describes growth as being slowest at the start and end of a given time period". Here's a curve for the daily cumulative number of deaths from Covid-19 in Ireland since the first case was diagnosed on March 1st to today:
This is a familiar chart for those of us who are following Covid-19 data closely. The curve follows the classic Gompertz shape and the number of deaths per day has thankfully slowed. But for how long?
A similar chart drawn for cumulative cases over the same period is a little bit different:
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