whicli the dots fell. The upper edge of the cross-hatching shows the maximum of the incomes, and the lower limit of the cross-hatching shows the minimum of the incomes reported for different years after graduation. The reader can thus get the whole story at a glance without being confused by the complexity which would result if all the dots were shown. Attention should be called to the fact that the curve of average income falls much

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YEARS AFTER RECEIPT OF B.S. DESREE OR COMPLETION OF FOUR YEAR COURSE

Courtesy of Data, Chicago

Fig. 165. Income of Graduates of Worcester Polytechnic Institute at Various Years After Graduation

Instead of showing hundreds of dots to represent the data received from different graduates, the chart was simplified by shading the area representing the range of income. The shading thus sliows the maximum and the minimum incomes. This general method is a worthy one

closer to the bottom

of the shaded area

than to the top of the

area. This fact shows

that, though there

are several graduates getting high salaries much above the average

income, nevertheless, if all of the dots were shown, most of the dots

would fall below the average line rather than above the average line.

A few extremely large incomes near the maximum line of the chart could