Six Sigma and Beyond: Statistical Process Control, Volume IV
D
Data
attribute
charts for, 191 “196, 276, 459
description of, 117, 155
sample frequency for, 277
short-run control charts for, 289 “291, 294 “295
characterization of, 4
collection of, 50 “51
non-normal , 299
organizing of, 50 “51
plotting on normal probability paper, 372
reorganizing of, 49
summarization techniques for
categorical distributions, 50
characteristics of, 51
frequency distribution, 49, 52
histogram, 52 “54
numerical distributions, 49, 52
overview of, 49 “50
qualitative distributions, 50
quantitative distributions, 49
variable
control charts for, 420
description of, 117, 155, 276
SQC session, 395 “397
% Defective, 440 “453
Defective products, 232
Defects chart, 175 “177
Deming's management principles, 423 “424
Descriptive statistics
measures of central tendency
mean, 65 “66
median, 66 “67
mode, 67
measures of dispersion
description of, 68
mean interpretation using, 68
range, 68 “69
standard deviation, 69 “72
overview of, 65
Design of experiments, 46 “47
Difference control charts
description of, 196 “197
lot plot method, 197 “198
Distance tests, 91 “94
Distribution
bimodal, 371
categorical, 50
chi-square, 431 “432
continuous probability, 411
cumulative frequency, 56
density function of, 411
discrete probability, 411
f, 433 “434
frequency
cumulative, 56
definition of, 49, 52
example of, 53
gamma, 413 “414
gamma, 436
gamma 2 , 437
mode of, 302
non-normal, 300 “305
normal
area under normal curve, 74, 79, 426 “429
characteristics of, 73 “75
control charts and, relationship between, 113 “114
curvature of, 73 “74
description of, 73
mean of, 73
moment tests for, 94 “97
overview of, 73
standard deviation, 69
standardized values, 75 “78
normal probability function, 370
numerical, 49, 52
Poisson, 412
probability, 78
qualitative, 50
quantitative, 49
skewed
capability sheet for, 463
description of, 300 “301, 303
symmetric, 302 “303
t, 430
Dot plots, 58
DPMO, 440 “453