https://www.oliverstringham.com/categories/stats/ Recent content in stats on Oliver C. Stringham Hugo -- gohugo.io en Wed, 22 Apr 2026 00:00:00 +0000 https://www.oliverstringham.com/blog/analysis/fish-spawn-power-analysis/ Wed, 22 Apr 2026 00:00:00 +0000 https://www.oliverstringham.com/blog/analysis/fish-spawn-power-analysis/ Background A colleague asked a seemingly simple question: “How many water samples would we need to reliably detect a difference in eDNA concentration between a daytime baseline and a nighttime spawning event for a migratory fish species that spawns at night?" A seemingly simple question… So, if you’re trying to detect a spawning event using environmental DNA (eDNA), you’d compare daytime baseline concentrations to nighttime concentrations taken during the spawning window.