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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
Standard deviation is a measure of the variation or diversity of scores in a set of data. It is used to determine how much data varies from the average of a population, to measure uncertainty and is also used to measure the volatility of a stock.
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