(Answered) The sampp 500 index has a probability 056 of increasing in

Statistics

The S&P 500 index has a probability 0.56 of increasing in any week. Moreover, the change in the index in any given week is not influenced by whether it rose or fell in earlier weeks. Let X be the number of weeks among the next 16 weeks in which the index rises.

What is the standard deviation of X?

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