Question
If two sections of a math class have standard deviations SD1 and SD2 respectfully, and there are n1 people in section 1 and n2 people
If two sections of a math class have standard deviations SD1 and SD2 respectfully, and there are n1 people in section 1 and n2 people in section 2, how do you calculate the standard deviation of the combined sections?
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An Introduction to the Mathematics of financial Derivatives
Authors: Salih N. Neftci
2nd Edition
978-0125153928, 9780080478647, 125153929, 978-0123846822
