INDEX
p. 237
AGE, 150 
De Moivre, 20 
Alga, 123 
Dependent variate, 114 
Altitude, 130 seq. 
De Winton, 26, 81, 93 
Analysis of variance, 188 seq. 
Diagrams, 27 seq. 
Arithmetic mean, 15, 44 
Dice records, 66 
Array, 144 
Dilution method, 60 
Association, degree of, 89 
Discontinuous distributions, 56
seq. 
Autocatalytic curve, 32, 212 
Discontinuous variates, 40 

Dispersion, 79 
Baby, growth of, 28 
Distribution, kinds of, 4 seq. 
Bacteria, 60, 112 
Distribution, problems of, 9 
Barley, 72 
Distributions, 43 seq. 
Bateson, 26, 81, 93 
Dot diagram, 33 
Bernoulli, 10, 65 
Drosophila melanogaster, 214 
Binomial distribution, 10, 44, 65
seq. 
Efficiency, 13 
Bispham, 92 
Efficient
statistics, 13, 24 
Blakeman, 220 
Elderton, 22, 78 
Bortkewitch, 57 
Errors, theory, 3 
Bottomley, 23 
Errors of fitting, 14 
BristolRoach, 123 
Errors of grouping, 53 
Broadbalk, 33, 119 
Errors of random sampling, 14, 53 
Burgess, 21 
Estimation, 9 
Buttercups, 41 
Eye facets, 214 


Cards,
36, 133 
Fisher, 23 
Cercis Canadensis, 186, 196 
Frequency curve, 6, 39 
χ^{2}
distribution, 16, 21 seq., 77 seq., 98 
Frequency diagrams, 37 Frequency distributions, 3 seq.,
43 
Chloride of potash, 203 
Frew, 72 
Consistent statistics, 12 
Fungal colonies, 60 
Contingency tables, 84 seq. 

Correlation, 6 
Galton, 6, 21 
Correlation coefficient, 22, 138 seq. 
Gammarus, 91 
Correlation coefficient, tables,
174 
Gases, kinetic theory, 2 
Correlation diagrams, 33 
Geissler, 69 
Correlation ratio, 17, 218 seq. 
Glaisher, 21 
Correlation table, 33, 36, 140 
Goodness of fit, 9, 77 seq.,
212 
Covariation, 6 
Gout fly, 72 
Cushny, 107 
Greenwood, 85 

Grouping, 38, 51 seq. 
Deathrates, 42 
Growth rate, 27 
238
Haemocytometer,
58 
Multiple births, 71

Hair colour, 86

Multiple
correlation, 17, 221 
Hall, 23,
225, 229 
Mumford,
151 
Harris, 179,
186, 196 

Heredity,
152 seq. 
Natural
selection, theory, 2 
Hersh,
214 
Nitrogenous
fertilisers, 119 
Hertfordshire,
133 Histogram,
39 
Normal
distribution, 10, 12, 17, 44 seq., 48 seq. 
Homogeneity,
77 seq., 194 
Normal distribution,
tables, 76 
Horsekick,
57 
Normality,
test of, 54 seq. 
Huxley,
91 

Hyoscyamine,
108 Hyperbolic
tangent, 23 
Organisms,
presence and absence, 64 seq. 

Ovules,
186, 196 
Inconsistent
statistics, 12 

Independence,
84 seq. 
Parameters,
7 
Independent
variate, 114 
Partial
correlation, 92, 150 seq. 
Index of
dispersion, 60, 71 
Partition
of χ^{2}, 93 seq. 
Information,
relevance of, 6 seq. Interclass
correlation, 177 
Pearson, 6,
16, 17, 21, 22, 37, 41, 54, 78, 105, 139 
Intraclass
correlation, 17, 176 seq. 
Peebles,
107 
Inverse
probability, 10 
Plot
experimentation, 224 
Kelley, 21 
Poisson
series, 10, 15, 16, 44, 57 seq. 
Kinetic
theory of gases, 2 
Polynomial,
117 

Poor law
relief, 160 
Laplace,
10, 20 
Populations,
1 seq., 37, 43 
Latin
square, 229 
Potatoes,
203 
Latitude,
130 seq. 
Primula,
26, 81, 93 
Lawrence,
Kansas, 196 
Probability,
theory, 9 
Lee, 37,
105, 139 
Probable
error, 19, 47 
Lethal,
97 
Product
moment correlation, 146 
Lexis, 79 
Pure
cultures, 65 
Likelihood,
11, 14, 24 

Linkage,
24, 91, 97 
Quartile,
47 
Logarithmic
scale, 32 

Longitude,
130 seq. 
Rainfall,
34, 55, 130 seq., 158 Rain
frequency, 200 
Mangolds,
225, 229 
Reduction
of data, 1 
Mass
action, theory, 2 
Regression
coefficients, 17, 114 seq. 
Mean, 15,
44, 101 seq. 
Regression
formulae, 114 seq., 211 
Mean,
error curve of, 4 
Relative
growth rate, 27, 123 
Mendelian
frequencies, 81, 87 seq., 93 
Richmond,
200 Rothamsted,
33, 55, 203 
Meramec
Highlands, 196 

Mercer,
225, 229 
Selection,
theory, 2 
Method of
least squares, 221 
Series,
correlation between, 171 
Method of
maximum likelihood, 14,24 
Sex difference,
193 Sex
ratio, 69 
Mice, 88 
Shaw, 200 
Miner,
152 
Sheppard,
21 
Modal
class, 38 Moments,
48, 70, 74 seq. 
Sheppard’s
correction, 49, 149 seq., 218 
Motile
organisms, 64 
Significance,
43 
239
Skew
curves, 48 
Thornton,
112 
Small
samples, 60 seq., 71 seq., 105, 117 seq.,
156 seq., 194 
Tocher,
86 Transformed
correlation, 161 
Soporifics,
108 
seq., 181 
Specification,
8 
Twin
births, 71 
Standard
deviation, 4, 46 seq. 
Typhoid,
85 
Standard
error, 47, 52 

Statistic,
1 seq., 7 seq., 43 
Variance,
12, 92 
Stature,
37, 49, 103, 139, 147, 193 
Variate,
5 
“
Student,” 16, 17, 19, 22, 58, 105, 106, 108,
110, 111, 118 
Variation,
1 seq. 
Sufficient
statistics, 15 
Wachter,
88 
Sugar
refinery products, 61 
Weldon,
67 
Sulphate
of potash, 203 
Wheat,
33, 34, 119, 158 
Summation,
128 
Working
mean, 49 
Systematic
errors, 169 seq. 


Yeast, 58

t
distribution, 17, 22, 137 
Young,
151 
Tables,
20 seq., 76, 98, 137, 174, 210 
Yule, 78,
85, 160 
Temperature,
214 

Tests of
significance, meaning of, 43 
z
distribution, 17, 23, 210 