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What is the difference between step deviation method and assumed mean method in statistics |
| Answer» Both assumed mean method and step deviation method are ways to find mean without any complications...step deviation method is just an elaboration of assumed mean.1. Assumed Mean method:Step 1- Tabulate the continuous class intervals and frequency alongwith class marks. Class Mark =\xa0Upper Limit + Lower Limit 2Step 2- Assume any of the class marks to be\xa0your mean .Step 3-\xa0Take out the differences of the assumed mean and class marks.{ xi\xa0- a = di}Example if the class marks are 20, 30,40,50,60,70 and so on......and if the a =50 then,di\xa0is -30,-20,-10,0,10,20and so on.....Step 4: Multiply fi\xa0and di\xa0.Step5:\xa0\xa0 d =\xa0sum of fidi sum of\xa0fiStep 6: Mean = a + d | |