Q-Q plots,
See quantile plots
Q n , 280
quantile plots, 253
appearance, 259 “263, 265
axes, percentile scale, 263, 305
axis
beta distribution, 258, 301
creating, 298
diagnostics, 299
distribution reference lines, 264, 366
distributions for, 300
exponential distribution, 260, 301
frame, color, 259
gamma distribution, 260, 301
interpreting, 299
legends, suppressing (UNIVARIATE), 366
location parameters, estimation of, 304
lognormal distribution, 261, 302, 369, 373
lognormal distribution, percentiles, 372
nonnormal data, 368
normal distribution, 262, 302, 365
options summarized by function, 255
overview, 253
parameters for distributions, 255, 258, 259, 262 “266
percentiles, estimates of, 305
reference lines, 259, 260, 263
reference lines, options, 259, 261 “263, 265
scale parameters, estimation of, 304
shape parameters, 264, 303
three-parameter Weibull distribution, 302
threshold parameter, 265
threshold parameters, estimation of, 304
tick marks on horizontal axis, 260
tiles for comparative plots, 261
two-parameter Weibull distribution, 303
Weibull distribution, 266, 375
quantile-quantile plots,
See quantile plots
quantiles
defining, 273
empirical distribution function, 273
histograms and, 310
weighted average, 273
rank scores, 103
relative risk, 137
cohort studies, 123
logit estimate, 141
Mantel-Haenszel estimate, 141
reliability estimation, 3
ridit scores, 103
risks and risk differences, 120
robust estimates, 207, 209
robust estimators, 278, 329
Gini s mean difference, 280
interquartile range, 280
median absolute deviation (MAD), 280
Q n , 280
S n , 280
Winsorized means, 278
robust measures of scale, 280
rounding, 207, 269
UNIVARIATE procedure, 269
row mean scores statistic, 136
saving
example, 52
scale estimates
robust, 207
scale parameters, 304
probability plots, 304
quantile plots, 304
shape parameters, 303
probability plots, 251
quantile plots, 264
Shapiro-Wilk statistic, 293
Shapiro-Wilk test, 206
sign test, 275, 276
paired data and, 332
signed rank statistic, computing, 277
simple kappa coefficient, 127, 129
singularity of
smoothing data distribution,
See kernel density estimation
S n , 280
Somers D statistics, 108, 112
Spearman correlation statistics, 8
probability values, 16
Spearman partial correlation, 3, 13
Spearman rank-order correlation, 3, 16, 34
Spearman rank correlation coefficient, 108, 114
standard deviation, 8
stratified analysis
FREQ procedure, 65, 84
stratified table
example, 174
Stuart s tau- c statistic, 108, 112
Student s t test, 275, 276
summary statistics
sums of squares and crossproducts, 8
t test
Student s, 275, 276
table scores, 103
tables
frequency and crosstabulation (FREQ), 65, 84
one-way frequency, 151, 152
one-way, tests, 103, 104
two-way, tests, 104, 105
Tarone s adjustment
Breslow-Day test, 142
tests for location, 275, 331
paired data, 275, 332
sign test, 276
Student s t test, 276
Wilcoxon signed rank test, 277
tetrachoric correlation coefficient, 94, 116
theoretical distributions, 300
three-parameter Weibull distribution, 302
probability plots, 302
quantile plots, 302
threshold parameter
probability plots, 252
quantile plots, 265
threshold parameters
probability plots, 304
quantile plots, 304
tiles for
histograms, 223
probability plots, 248
quantile plots, 261
trend test, 124, 177
two-parameter Weibull distribution, 303
probability plots, 303
quantile plots, 303