Size Of Keyboard		Sonatas That Use This Keyboard Size	Standard Deviation
In Octaves	In Number Of Notes
Five octaves	61	1, 2, 3, 4, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22	12.6265901824
Five octaves and a fifth	68	21, 23, 24, 25, 27	13.6366370872
Six octaves	73	26, 31, 32	13.7228312438
Six octaves and a fourth	78	29, 30	14.4221876246