This question refers to the same data set as the previous question. Recall that all numbers in the data file are given in percent What was the volatility (standard deviation) of Berkshire Hathaway's monthly returns during the past 60 months? Enter your answer a percent number and round your answer to three decimal places. For example, please enter 45.123 instead of 45.123% or 0.451. (For experts in statistics: Both the "population standard deviation" and the "sample standard deviation are acceptable answers.) This question refers to the same data set as the previous question. Recall that all numbers in the data file are given in percent What was the volatility (standard deviation) of Berkshire Hathaway's monthly returns during the past 60 months? Enter your answer a percent number and round your answer to three decimal places. For example, please enter 45.123 instead of 45.123% or 0.451. (For experts in statistics: Both the "population standard deviation" and the "sample standard deviation are acceptable answers.)