262 



INDEX 



Relative cumulative frequency curve, 

 for binomial distribution, 81, 82 



for chi-square distribution, 133 



for normal distribution, 96 



for t distribution, 162, 163 

 Relative variability, 40 

 Rh factor in bloods, 60 

 Roth, L., 75 



Sample, 7, 43 



Sampling distribution of, chi-square, 

 133, 252 



correlation coefficient, 219 



mean, 155, 157 



t, 161, 162, 251 

 Sampling public opinion, 113, 118 

 Scatter (Dot) diagram, 194 

 Semi-log paper, construction of, 103, 

 104 



use, 104, 105 

 Seymour, Ada, 238 

 Single events, defined, 50 



with equal relative frequencies, 50 



with unequal relative frequencies, 56 

 Skewed distributions, 32 

 Slope of true regression line, 199, 205 

 Snedecor, George W., 152, 191, 242 

 Spearman, C, 3, 226 

 Staatenkunde, 2 



Standard deviation of, a measurement, 

 X, 15 



binomial distribution, 84 



difference between two means, 177 



estimated average Y for a given X, 

 212 



estimated particular Y for a given X, 

 213 



fraction, r/n, 84 



regression coefficient, 211 



sample mean, 157, 158, 161 



Standard deviation of, Y after linear 

 adjustment for X, 210 

 z, 219 

 Standard normal units, 92 

 "Student," 4 



t, 161, 178, 211, 213, 214, 218, 222 

 degrees of freedom for, 163 

 observed distribution, 9 D/F, 162 

 r.c.f. distribution, 162, 163 

 table of probability distribution, 251 

 Tallying frequency distributions, 24 

 Tau, r, 227 

 Taylor, L. W., 139 



Testing hypotheses regarding, correla- 

 tion coefficient, 218, 222 

 difference between correlation coeffi- 

 cients, 222 

 difference between means, 176 

 difference between regression coeffi- 

 cients, 222 

 mean, 170 



regression coefficient, 211 

 theoretical proportions in a binomial 

 population, 130 

 Tippett, L. H. C, 152 

 Transformation of the correlation coef- 

 ficient, 219 



Unbiased estimate, 122, 161 



Variance, 15 



Waugh, Albert E., 48, 112 

 Weiner, A. S., 151 

 Westergaard, Harald L., 1 

 Westerman, Beulah, 235 

 Wise, George, 17 

 Woodruff, H. Boyd, 45 



2-transformation, 219 



