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
Bristol-Roach, 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.
Death-rates, 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
Horse-kick, 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