moyenne
1.2*21+1.3*37+1.4*52+1.5*22+1.6*14/(21+37+52+22+14)=1.53
médiane
1.4
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moyenne
1.2*21+1.3*37+1.4*52+1.5*22+1.6*14/(21+37+52+22+14)=1.53
médiane
1.4