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Problem: Geometric mean {{10-20,15},{20-30,25},{30-40,20},{40-50,12},{50-60,8}} [ Calculator, Method and examples ]

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Your problem -> Geometric mean {{10-20,15},{20-30,25},{30-40,20},{40-50,12},{50-60,8}}

Geometric mean :
 Class Mid value (x)(2) f flog(x) 10 - 20 15 15 40.6208 20 - 30 25 25 80.4719 30 - 40 35 20 71.107 40 - 50 45 12 45.6799 50 - 60 55 8 32.0587 --- --- --- --- -- -- n=80 sum flog(x)=269.9382

GM of X = Antilog((sum flog(x))/n)

= Antilog((269.9382)/(80))

= Antilog(3.3742)

= 29.2017

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