Standard deviation is the square root of variance, but variance is given by mean, so divide by number of samples. That is : 38.5/10 = 3.58. But standard deviation equals the square root of variance, so SD = the square root of 3.85 which is 1.96.
The virginal(s): The virginal, also called virginals, usually has a rectangular case with the keyboard across the wide side. As with the spinet, the strings run side-to-side relative to the player. Again, it saves on wallspace, and again they rate their own FAQ. Virginals were fairly early, 15th and16th centuries.
A Chordophone is 'any musical instrument that makes sound by way of a vibrating string or strings stretched between two points' so the Violin would be a good example.ince a chordophone is, by definition, a stringed instrument, all stringed instruments are in the chordophone family. But if you want to be more precise there are the violin, â¦ the guitar, the cello, the harp, double bass, viola, mandolin and the ukulele. 3 people found this useful.