0 I 2 J 4 $ 6 T e <) 10 II 17 13 14 IS 16 n 18 19 20 21 n U NUMBER OF COMPANIES

Joseph E. Pogue, "Economics of the Petroleum Industry," March liJiQ, The Chase National Bank of the City of New York.

B. Concentration of Production and Refining in the United States in 1937; Chart Showing Cunnulative Percentages of National Totals Represented by Largest Units.

OGIVE AND LORENZ CHARTS

Henry S. Dfnniton. "ManBBrmcnt and the Buiinets Cycle." Journal of the American StatUticnl Association. Washington. D C . March 1922. SCALE .8

A. Relation of Disbursements to Receipts from Sales in the Upward Swing of the Business Cycle.

Brown. BinKham. and Tcmnomeroff . "Lafioratory Handbook of Statistical Methods." McGraw-Hill. 1931.

B. An Ogive Curve Plotted on Probability Paper to Determine the Probable Distribution of 100,000 Shirts According to Neck Measurements.

1. When an ogive curve is plotted on "probability" paper, assuming that the frequency

curve is symmetrical, the curve is in the form of a straight line. For this reason it is possible to construct the curve for any particular problem with a small number of observations.

2. For explanation 6f this chart, see 335.

111=111=111=111=111

334 ■ ^^^.,^.^ ■

GRAPHIC PRESENTATION

TABLE A. Neck Measurements of White Troops at Demobilization

Neck

Measurements,

Centimeters

Number of Men

Upper Limit of Class Interval

Cumulative Frequency

Cumulative

Frequency,

Per Cent

of Total

28.5-29.49

0.06

29-5-30.49

30.S

0.29

30.5-31-49

0.62

31.5 32.49

1. 133

32.5

1,721

1.81

32.5-33-49

4,286