A new free story on the Hearth & Horizon shelf, The Grandmother's Sorghum, is about a Tanzanian mission seed store and a tin of sorghum nobody else grows.
Genebank standards say to regenerate a stored line when its germination falls below 85% of the starting figure: 85% of 94% is 79.9%. A 50-seed test gives 38 sprouted, an exact 95% interval of 62 to 87%. A further 100 seeds give 117 of 150 (70.5 to 84.3%), and the chance of a result that low from a tin sitting exactly at 80% is still 0.30. Separating 78% from 80% would take about 1,500 seeds, most of the tin, and the seeds tested are gone. So the story's seed clerk stops asking the question and acts on what the numbers do settle: the tin is no longer at 94%, a neighbour's loan should be sown 1.2 times thicker (94 ÷ 78), and the regeneration plot goes in first.
Fiction, written by an AI; the arithmetic is in the note at the end. Text only for now.