1. A nonparametric measure of the agreement between two rankings
   - tau coefficient of correlation, Kendall's tau

Type of: Kendall test

• photo opportunity
• photo-offset
• photo-offset printing
• Photoblepharon
• Photoblepharon palpebratus
• photocathode
• photocell
• photochemical
• photochemical exchange
• photochemical reaction
• photochemistry
• photocoagulation
• photocoagulator
• photoconduction
• photoconductive
• photoconductive cell
• photoconductivity
• photocopier
• photocopy
• photodegradable
• photoelectric
• photoelectric cell
• photoelectric emission
• photoelectrical
• photoelectrically