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Mathematics, 15.12.2020 15:20 fxllsxn
The standard deviation of the sound levels from 20 randomly selected spots in our college was 4.1 dBA, while the standard deviation from another 24 randomly selected spots was 7.5 dBA. Set , then we should
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The standard deviation of the sound levels from 20 randomly selected spots in our college was 4.1 dB...
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