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- ?Lv 72 years agoFavourite answer
To 2 significant figures, 95% of the measurements fall with 2 standard deviations (±2σ) of the mean. This is fact you need to learn. Look at diagram in the link to see this.
This means 95% of the weights are between (135-2*11)grams and (135+2*11)grams, which means between 113g and 157grams.
The first three values in the list fit into this range. But not 103grams nor 159grams.
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