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From the sets given below, select equal sets : A= {2,4,8, 12} , B = { 1,2, 3, 4} , C = { 4, 8. 12 , 14} , D = { 3,1,4,2} E= {-1,1} , F = {0, a} , G = {1, -1} , H = { 0, 1}

The number of complaints received on 8 different days of two different models of mobile phones sold by a shop are as follows: Model A: 22 18 25 20 16 17 12 22 Model B: 16 14 22 12 14 20 10 12 What measure of central tendency should be used to determine which model is better? Find the measure of this central tendency and state which model has better performance?

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