First, as can be seen in Fig 6A , the coefficient for the linear term ( β 1 = 0.726, p < 10 −7 ) is large, positive and highly significant, confirming that average performance increased with person-hours.
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First, as can be seen in Fig 6A , the coefficient for the linear term ( β 1 = 0.726, p < 10 −7 ) is large, positive and highly significant, confirming that average performance increased with person-hours.