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Mathematics 9 Online
OpenStudy (anonymous):

PLEASE HELP ME January: $25 February: $55 March: $15 April: $30 mean: 31.25, standard deviation: 17.017 Oliver wants to find the standard deviation of the amount he adds to his bank account every month. He forgot that his parents match his deposits so all of the amounts should be doubled. What is the new standard deviation?

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