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PERCENT NUMBER FIRMS

Redrawn from United States Department of Commerce. SCALE .9

Distribution of Wholesale Sales by Size of Firm for the United States According to the 1930 Census.

1. The "line of equal distribution" is drawn in this Lorenz chart. The distance between

the curve and the diagonal indicates the degree to which the data is removed from a perfectly uniform distribution. This feature statisticians call dispersion or scatteration.

2. If all firms for which data had been gathered were of the same size, the curve would

appear as a diagonal line. The degree of concentration among the large firms is shown by the departure of the plotted curve from the diagonal, which is in this case quite marked.

OGIVE AND LORENZ CHARTS

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