August 2011
Intermediate to advanced
634 pages
21h 57m
English
Content preview from A First Course in Quality Engineering, 2nd Edition
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Statistics for Quality 139
Analyze the data, and provide suitable answers to the company� Make
any assumptions you need, and state them clearly� You can also verify the
assumptions you make� Remember, a good analysis includes use of both
graphical and analytical tools, and we do not conclude if two populations
are equal or not equal until we have made a signicance test about their
parameters�
Sand
Batch Trial D Tester TA Tester
Specimen 1 Specimen 2 Specimen 3 Specimen 1 Specimen 2 Specimen 3
1 1 340 360 375 359 351 345
2 350 335 345 348 329 348
2 1 225 210 250 254 255 247
2 255 245 230 244 253 202
3 1 220 250 245 243 251 235
2 240 225 230
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