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Ex 15.1, 1 - Find mean deviation about mean 4, 7, 8, 9 - Ex 15.1


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Ex 15.1, 1 Find the mean deviation about the mean for the data 4, 7, 8, 9, 10, 12, 13, 17 We use the formula Mean of the data = Sum of all terms / Total numbers of terms Mean = 4 + 7 + 8 + 9 + 10 + 12 + 13 + 17 / 8 = 80/8 = 10 We also find mean deviation about mean = Sum | x - Mean| /8 = 24/8 = 3

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.