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In a study of the effect of color on productivity,50 of 100

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In a study of the effect of color on productivity,50 of 100 [#permalink] New post 14 Apr 2004, 19:15
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B
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D
E

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.In a study of the effect of color on productivity,50 of 100 factory workers were moved from their drab workroom to a brightly colored workroom.Both these workers and the 50 who remained in the drab workroom increased their prod-uctivity, probably as a result of the interest taken by researchers in the work of both groups during the study.Which of the following, if true, would cast most doubt upon the author's inter-pretation of the study results given above?
(A) The 50 workers moved to the brightly colored room performed precisely the same manufacturing task as the workers who remained in the drab workroom.
(B) The drab workroom was designed to provide adequate space for at most 65 workers.
(C) The 50 workers who moved to the brightly colored workroom were matched as closely as possible in age and level of training to the 50 workers who remained in the drab work-room.
(D) Nearly all the workers in both groups had volunteered to move to the brightly colored workroom.
(E) Many of the workers who moved to the brightly colored workroom reported that they liked the drab workroom as well as or better than they liked the brightly colored workroom.
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 [#permalink] New post 14 Apr 2004, 19:19
What is level 8 and level 9?

My choice is B.

More elbow room means more productivity.
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 [#permalink] New post 14 Apr 2004, 20:37
The author says that since the workers moved to a brightly colored workroom, productivity increased. But the drab workroom is designed for 65 people and not for 100 people. This reduction in the number of people led to the increase in productivity. In other words, as kpadma explained,
'more elbow room means more productivity.'

Hence my answer is B too.
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 [#permalink] New post 15 Apr 2004, 06:55
OA is B. I arbitraily assinged level of difficulty at the scale on 10.
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  [#permalink] 15 Apr 2004, 06:55
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In a study of the effect of color on productivity,50 of 100

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