Question 2 - Examples - Chapter 13 Class 11 Statistics

Last updated at April 16, 2024 by

Example 14 - Coefficient of variation are 60, 70, standard - Co-efficient of variation

Go Ad-free

Transcript

Question 2 - Chapter 15 Class 11 Statistics - NCERT Solution Coefficient of variation of two distributions are 60 and 70, and their standard deviations are 21 and 16, respectively. What are their arithmetic means. For first distribution Coefficient of variation(CV) = 60 Standard deviation = 21 We know that CV = (𝑆𝑡𝑎𝑛𝑑𝑎𝑟𝑑 𝑑𝑒𝑣𝑖𝑎𝑡𝑖𝑜𝑛)/𝑀𝑒𝑎𝑛 × 100 60 = 21/𝑀𝑒𝑎𝑛 × 100 Mean = 21/60 × 100 Mean = 35 For second distribution Coefficient of variation(CV) = 70 Standard deviation = 16 We know that CV = (𝑆𝑡𝑎𝑛𝑑𝑎𝑟𝑑 𝑑𝑒𝑣𝑖𝑎𝑡𝑖𝑜𝑛)/𝑀𝑒𝑎𝑛 × 100 70 = 16/𝑀𝑒𝑎𝑛 × 100 Mean = 16/70 × 100 Mean = 22.85

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo