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tion of the increase or decrease of time consumed will be obtained.
This method can be used whenever two factors enter into the record.
Groups of variables orten appear where the mere distribution of
cases is important regardless of the order in which they came.
These can be shown by having various ranges of values, or
quantities represented along a base line and erecting above each
division a column proportional to the number of cases that fall
within the range of the values or quantities of that division. Such
a curve will appear as a series of rectangles standing along side
each other. Sometimes the distribution comes out more clearly by
joining the mid-points of each of the columns. The number of groups
represented on the base line and the distance by which each case is
to be represented depends on the nature of the data and the purpose
for which the graph is made. Tables Illustrating the Use of the
Above Formulae Column (1) is the list of letters representing
individuals. Column (2) is a series of measurements for the
individuals. Column (3) represents the individual deviations from
the average. Column (4) gives the squares for the deviations for
finding S. D. The measurements are arranged in their ascending
order for finding the median in column (5). TABLE 1 (1) (2) (3) (4)
(5)
A.273926B.2641626C.300026D.2641626E.273927F.273927G.2641627H.282427I.3663628J.2641630K.3663636L.273936M.3663636N.3663636O.366363615145015)6015)28427
Mnav. 30m.v. 4 18.93(5.D.)2 4.34 S.D.Table II presents another
series of measurements for the same subjects as table I. The
calculations are given in the same order. These two tables, I and
II, form the basis for the calculation of the coefficient of
correlation, table III. TABLE II A. 12 13 169 10 B. 11 14 196 11 C.
25 ...
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