Describe the measures of central tendency and measures of dispersion. What is their use in biology? (UPSC 2016, 15 Marks, )

केंद्रीय प्रवृत्ति के माप और प्रसार के माप का वर्णन करें। जीवविज्ञान में उनका क्या उपयोग है? (Describe the measures of central tendency and measures of dispersion. What is their use in biology?)