The following data shows the weight, in pounds, of 5 boxes: 3, 1, 2, 2, 2

What is the value of the mean absolute deviation of the weight of the boxes, and what does it represent about the weight of a box?

0.4 pound; on average, the weight of a box varies 0.4 pounds from the mean of 2 pounds
0.8 pound; on average, the weight of a box varies 0.8 pounds from the mean of 2 pounds
0.4 pound; the weight of 50% of the boxes is greater than 0.4 pound
0.8 pound; the weight of 50% of the boxes is greater than 0.8 pound

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The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.