Mathematics, 23.11.2019 05:31, nyceastcoast

To test the effect of music on productivity, a group of assembly line workers are given portable mp3 players to play whatever music they choose while working for one month. for another month, they work without music. the order of the two treatments for each worker is determined randomly. this is
(a) an observational study.
(b) a completely randomized experiment.
(c) a block design.
(d) a matched pairs experiment.
(e) impossible to classify unless more details of the study are provided.

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To test the effect of music on productivity, a group of assembly line workers are given portable mp3...