In Fig. 159 the reader may easily see for himself that there are many more small orders than there are large orders, because the pins are largely concentrated toward the left-hand side of the chart. It is this concentration at the left-hand side which has so greatly affected

Fig. i6o. Chart to Show the Theoretical Shape of Cumulative Curves for the Percentage of Total Orders and the Percentage of Total Business if There Is a Uniform Number of Orders in Each Class or Group

It makes no difference in the shape of the curves, as long as all classes contain the same number of orders, whether there is one order or one thousand orders in each class between vertical lines

The straight line shows the percentage of orders which contain more than any given number of pieces considered on the horizontal scale of the chart

The curved line shows the percentage of the total number of pieces carried by the orders which contain more than any given number of pieces considered on the horizontal scale

If there is not the same number of orders in all groups or zones the curves will take some other shape and the shape will depend on the peculiar distribution of orders as may be seen in Fig. 157, Fig. 158 and Fig. 159

FREQUENCY CURVES

the shape of curve "A" and curve "B" in Fig. 159. By comparing Fig. 160, we can see that if the distribution of orders in Fig. 159 had been uniform, curve "A" would have been a straight diagonal hue and curve "B" would have been a curved line bowed upward instead of bowed downward.