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.
Virginal, also called Virginals, orPair Of Virginals, musical instrument of the harpsichord family, of which it may be the oldest member. The virginal may take its name from Latin virga (ârodâ), referring to the jacks, or wooden shafts that rest on the ends of the keys and hold the plucking mechanism.