Social & Preventive Medicine Standard detion is defined as: March 2009, March 2013 (a, c, f h) A Value of middle observation when data is arranged in ascending order. B Arithmetic mean C Dispersion of values about the mean D Most frequently occurring value 💡 Explanation Standard detion is defined as: March 2009, March 2013 (a, c, f h) ✓ Correct Answer: C. Dispersion of values about the mean