To calculate the standard deviation of those numbers: 1  1. 2  2. Then for each number: subtract the Mean and square the result. 3  3. Then work out the mean of those squared differences. 4  4. Take the square root of that and we are done!o calculate the standard deviation of those numbers: 1  1. 2  Work out the Mean (the simple average of the numbers). 3  2. Then for each number: subtract the Mean and square the result.
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Admiral Michael S. Rogers, USN. since April 2, 2014. The Director of the National Security Agency (DIRNSA) is the highest-ranking official of the National Security Agency, which is a Defense Agency within the U.S. Department of Defense. The Director of the NSA also concurrently serves as Chief of the Central Security Service (CHCSS) and as Commander of U.S. Cyber Command (USCYBERCOM). As DIRNSA/CHCSS the officeholder reports through the Under Secretary of Defense for Intelligence, and as CDRUSCYBERCOM through the Commander of U.S. Strategic Command, to the Secretary of Defense. According to 10 U.S.C. Â§ 201 of the United States Code, the Director of the NSA is recommended by the Secretary of Defense and nominated for ...