Nursing pioneer Florence Nightingale was also responsible for what statistical developments?

Florence Nightingale was not only brave but brilliant. She developed a statistical method called the Nightingale rose diagram. The diagram used statistics to visualize the data to make it easier to understand.

https://en.wikipedia.org/wiki/Florence_Nightingale

Here is an example of one of her diagrams to track soldier mortality.

https://www.maharam.com/stories/sherlock_florence-nightingales-rose-diagram

The chart she devised was also called the coxcomb chart and is considered the forerunner of the pie chart we see so regularly now. Florence recognised that presenting data in a visual manner would be much easier for laymen, i.e. the public, to understand. She commented 'Printed tables and all-in double columns, I do not think anyone will read. None but scientific men ever look in the Appendix of a Report'. https://www.datacamp.com/blog/florence-nightingale-pioneer-of-data-visualization