Statistics Work
Diamonds
| IDNO | WEIGHT | COLOR | CLARITY | RATER | PRICE |
| 1 | 0.3 | D | VS2 | GIA | 1302 |
| 2 | 0.3 | E | VS1 | GIA | 1510 |
| 3 | 0.3 | G | VVS1 | GIA | 1510 |
| 4 | 0.3 | G | VS1 | GIA | 1260 |
| 5 | 0.31 | D | VS1 | GIA | 1641 |
| 6 | 0.31 | E | VS1 | GIA | 1555 |
| 7 | 0.31 | F | VS1 | GIA | 1427 |
| 8 | 0.31 | G | VVS2 | GIA | 1427 |
| 9 | 0.31 | H | VS2 | GIA | 1126 |
| 10 | 0.31 | I | VS1 | GIA | 1126 |
| 11 | 0.32 | F | VS1 | GIA | 1468 |
| 12 | 0.32 | G | VS2 | GIA | 1202 |
| 13 | 0.33 | E | VS2 | GIA | 1327 |
| 14 | 0.33 | I | VS2 | GIA | 1098 |
| 15 | 0.34 | E | VS1 | GIA | 1693 |
| 16 | 0.34 | F | VS1 | GIA | 1551 |
| 17 | 0.34 | G | VS1 | GIA | 1410 |
| 18 | 0.34 | G | VS2 | GIA | 1269 |
| 19 | 0.34 | H | VS1 | GIA | 1316 |
| 20 | 0.34 | H | VS2 | GIA | 1222 |
| 21 | 0.35 | E | VS1 | GIA | 1738 |
| 22 | 0.35 | F | VS1 | GIA | 1593 |
| 23 | 0.35 | G | VS1 | GIA | 1447 |
| 24 | 0.35 | H | VS2 | GIA | 1255 |
| 25 | 0.36 | F | VS1 | GIA | 1635 |
| 26 | 0.36 | H | VVS2 | GIA | 1485 |
| 27 | 0.37 | F | VS2 | GIA | 1420 |
| 28 | 0.37 | H | VS1 | GIA | 1420 |
| 29 | 0.4 | F | VS1 | GIA | 1911 |
| 30 | 0.4 | H | VS1 | GIA | 1525 |
| 31 | 0.41 | F | VS1 | GIA | 1956 |
| 32 | 0.43 | H | VVS2 | GIA | 1747 |
| 33 | 0.45 | I | VS1 | GIA | 1572 |
| 34 | 0.46 | E | VVS2 | GIA | 2942 |
| 35 | 0.48 | G | VVS2 | GIA | 2532 |
| 36 | 0.5 | E | VS1 | GIA | 3501 |
| 37 | 0.5 | E | VS1 | GIA | 3501 |
| 38 | 0.5 | F | VVS2 | GIA | 3501 |
| 39 | 0.5 | F | VS1 | GIA | 3293 |
| 40 | 0.5 | G | VS1 | GIA | 3016 |
| 41 | 0.51 | F | VVS2 | GIA | 3567 |
| 42 | 0.51 | G | VS1 | GIA | 3205 |
| 43 | 0.52 | D | VS2 | GIA | 3490 |
| 44 | 0.52 | E | VS1 | GIA | 3635 |
| 45 | 0.52 | F | VVS2 | GIA | 3635 |
| 46 | 0.52 | F | VS1 | GIA | 3418 |
| 47 | 0.53 | D | VS1 | GIA | 3921 |
| 48 | 0.53 | F | VVS2 | GIA | 3701 |
| 49 | 0.53 | F | VS1 | GIA | 3480 |
| 50 | 0.53 | G | VVS2 | GIA | 3407 |
| 51 | 0.54 | E | VS1 | GIA | 3767 |
| 52 | 0.54 | F | VVS1 | GIA | 4066 |
| 53 | 0.55 | E | VVS2 | GIA | 4138 |
| 54 | 0.55 | F | VS1 | GIA | 3605 |
| 55 | 0.55 | G | VVS2 | GIA | 3529 |
| 56 | 0.56 | F | VS1 | GIA | 3667 |
| 57 | 0.56 | I | VVS2 | GIA | 2892 |
| 58 | 0.57 | G | VVS2 | GIA | 3651 |
| 59 | 0.59 | G | VVS2 | GIA | 3773 |
| 60 | 0.6 | F | VS1 | GIA | 4291 |
| 61 | 0.62 | E | VVS1 | GIA | 5845 |
| 62 | 0.63 | G | VVS2 | GIA | 4401 |
| 63 | 0.64 | G | VVS1 | GIA | 4759 |
| 64 | 0.66 | H | VVS1 | GIA | 4300 |
| 65 | 0.7 | F | VS1 | GIA | 5510 |
| 66 | 0.7 | G | VS1 | GIA | 5122 |
| 67 | 0.7 | H | VVS2 | GIA | 5122 |
| 68 | 0.7 | I | VS2 | GIA | 3861 |
| 69 | 0.71 | F | VVS2 | GIA | 5881 |
| 70 | 0.71 | F | VS1 | GIA | 5586 |
| 71 | 0.71 | F | VS2 | GIA | 5193 |
| 72 | 0.71 | H | VVS2 | GIA | 5193 |
| 73 | 0.72 | F | VS2 | GIA | 5263 |
| 74 | 0.8 | I | VVS2 | GIA | 5441 |
| 75 | 0.82 | I | VS2 | GIA | 4948 |
| 76 | 0.84 | H | VS2 | GIA | 5705 |
| 77 | 0.85 | F | VS2 | GIA | 6805 |
| 78 | 0.86 | H | VVS2 | GIA | 6882 |
| 79 | 0.89 | H | VS1 | GIA | 6709 |
| 80 | 0.9 | I | VVS2 | GIA | 6682 |
| 81 | 0.5 | E | VS1 | GIA | 3501 |
| 82 | 0.5 | G | VVS1 | GIA | 3432 |
| 83 | 0.51 | F | VVS1 | GIA | 3851 |
| 84 | 0.55 | H | IF | GIA | 3605 |
| 85 | 0.56 | E | VS1 | GIA | 3900 |
| 86 | 0.57 | H | VVS1 | GIA | 3415 |
| 87 | 0.6 | H | IF | GIA | 4291 |
| 88 | 0.63 | E | IF | GIA | 6512 |
| 89 | 0.7 | E | VS1 | GIA | 5800 |
| 90 | 0.7 | F | VVS1 | GIA | 6285 |
| 91 | 0.7 | F | VS2 | GIA | 5122 |
| 92 | 0.7 | F | VS2 | GIA | 5122 |
| 93 | 0.7 | G | VS1 | GIA | 5122 |
| 94 | 0.7 | H | VVS2 | GIA | 5122 |
| 95 | 0.71 | D | VS1 | GIA | 6372 |
| 96 | 0.71 | E | VS1 | GIA | 5881 |
| 97 | 0.71 | H | VVS2 | GIA | 5193 |
| 98 | 0.72 | E | VS1 | GIA | 5961 |
| 99 | 0.72 | H | VVS1 | GIA | 5662 |
| 100 | 0.73 | E | VS2 | GIA | 5738 |
| 101 | 0.73 | H | VS1 | GIA | 5030 |
| 102 | 0.73 | H | VS1 | GIA | 5030 |
| 103 | 0.73 | I | VVS1 | GIA | 4727 |
| 104 | 0.73 | I | VS1 | GIA | 4221 |
| 105 | 0.74 | G | VVS2 | GIA | 5815 |
| 106 | 0.74 | H | VS2 | GIA | 4585 |
| 107 | 0.75 | D | VVS2 | GIA | 7368 |
| 108 | 0.75 | I | VVS2 | GIA | 4667 |
| 109 | 0.75 | I | VS1 | GIA | 4355 |
| 110 | 0.76 | D | IF | GIA | 9885 |
| 111 | 0.77 | F | VVS1 | GIA | 6919 |
| 112 | 0.78 | H | VS1 | GIA | 5386 |
| 113 | 0.8 | I | VS2 | GIA | 4832 |
| 114 | 0.83 | E | VS2 | GIA | 7156 |
| 115 | 0.9 | F | VS1 | GIA | 7680 |
| 116 | 1 | D | VVS1 | GIA | 15582 |
| 117 | 1 | D | VS1 | GIA | 11419 |
| 118 | 1 | E | VS1 | GIA | 10588 |
| 119 | 1 | E | VS2 | GIA | 9757 |
| 120 | 1 | F | IF | GIA | 13913 |
| 121 | 1 | F | VVS2 | GIA | 10588 |
| 122 | 1 | F | VS1 | GIA | 10713 |
| 123 | 1 | F | VS2 | GIA | 9480 |
| 124 | 1 | G | VVS2 | GIA | 9896 |
| 125 | 1 | G | VS1 | GIA | 9619 |
| 126 | 1 | G | VS2 | GIA | 9169 |
| 127 | 1 | G | VS2 | GIA | 9203 |
| 128 | 1 | H | VS2 | GIA | 8788 |
| 129 | 1 | I | VS1 | GIA | 8095 |
| 130 | 1 | I | VS2 | GIA | 7818 |
| 131 | 1.01 | D | VVS1 | GIA | 16008 |
| 132 | 1.01 | E | VS1 | GIA | 10692 |
| 133 | 1.01 | E | VS2 | GIA | 9853 |
| 134 | 1.01 | F | VS1 | GIA | 10272 |
| 135 | 1.01 | F | VS2 | GIA | 9573 |
| 136 | 1.01 | H | VS1 | GIA | 9153 |
| 137 | 1.01 | H | VS2 | GIA | 8873 |
| 138 | 1.01 | I | VVS1 | GIA | 8873 |
| 139 | 1.01 | I | VVS2 | GIA | 8455 |
| 140 | 1.01 | I | VS2 | GIA | 7895 |
| 141 | 1.02 | F | VS1 | GIA | 10372 |
| 142 | 1.02 | F | VS2 | GIA | 9666 |
| 143 | 1.02 | G | VVS2 | GIA | 10090 |
| 144 | 1.03 | E | VS1 | GIA | 10900 |
| 145 | 1.04 | F | VS1 | GIA | 10571 |
| 146 | 1.04 | I | IF | GIA | 9563 |
| 147 | 1.05 | I | VVS2 | GIA | 8781 |
| 148 | 1.06 | G | VS2 | GIA | 9743 |
| 149 | 1.06 | H | VS2 | GIA | 9302 |
| 150 | 1.07 | I | VVS2 | GIA | 8945 |
| 151 | 1.1 | H | VS2 | GIA | 9646 |
| 152 | 0.18 | F | VVS1 | IGI | 823 |
| 153 | 0.18 | F | VVS2 | IGI | 765 |
| 154 | 0.18 | G | IF | IGI | 803 |
| 155 | 0.18 | G | IF | IGI | 803 |
| 156 | 0.18 | G | VVS2 | IGI | 705 |
| 157 | 0.18 | H | IF | IGI | 725 |
| 158 | 0.19 | D | VVS2 | IGI | 967 |
| 159 | 0.19 | E | IF | IGI | 1050 |
| 160 | 0.19 | F | IF | IGI | 967 |
| 161 | 0.19 | F | VVS1 | IGI | 863 |
| 162 | 0.19 | F | VVS2 | IGI | 800 |
| 163 | 0.19 | G | IF | IGI | 842 |
| 164 | 0.19 | G | VVS1 | IGI | 800 |
| 165 | 0.19 | H | IF | IGI | 758 |
| 166 | 0.2 | D | VS1 | IGI | 880 |
| 167 | 0.2 | G | IF | IGI | 880 |
| 168 | 0.2 | G | VS1 | IGI | 705 |
| 169 | 0.2 | G | VS2 | IGI | 638 |
| 170 | 0.21 | D | VS1 | IGI | 919 |
| 171 | 0.21 | E | IF | IGI | 1149 |
| 172 | 0.21 | F | IF | IGI | 1057 |
| 173 | 0.21 | G | IF | IGI | 919 |
| 174 | 0.22 | E | IF | IGI | 1198 |
| 175 | 0.23 | E | IF | IGI | 1248 |
| 176 | 0.23 | F | IF | IGI | 1147 |
| 177 | 0.23 | G | IF | IGI | 995 |
| 178 | 0.24 | H | IF | IGI | 1108 |
| 179 | 0.25 | F | IF | IGI | 1485 |
| 180 | 0.25 | G | IF | IGI | 1283 |
| 181 | 0.25 | H | IF | IGI | 1149 |
| 182 | 0.25 | I | IF | IGI | 1082 |
| 183 | 0.26 | F | IF | IGI | 1539 |
| 184 | 0.26 | F | VVS1 | IGI | 1365 |
| 185 | 0.26 | F | VVS2 | IGI | 1260 |
| 186 | 0.26 | I | IF | IGI | 1121 |
| 187 | 0.27 | F | IF | IGI | 1595 |
| 188 | 0.27 | H | IF | IGI | 1233 |
| 189 | 0.28 | I | IF | IGI | 1199 |
| 190 | 0.29 | G | IF | IGI | 1471 |
| 191 | 0.29 | I | IF | IGI | 1238 |
| 192 | 0.3 | E | VVS2 | IGI | 1580 |
| 193 | 0.3 | F | VVS2 | IGI | 1459 |
| 194 | 0.3 | G | VVS1 | IGI | 1459 |
| 195 | 0.3 | H | VVS2 | IGI | 1218 |
| 196 | 0.3 | I | IF | IGI | 1299 |
| 197 | 0.31 | E | VVS2 | IGI | 1628 |
| 198 | 0.31 | F | VVS1 | IGI | 1628 |
| 199 | 0.31 | I | IF | IGI | 1337 |
| 200 | 0.32 | H | IF | IGI | 1462 |
| 201 | 0.33 | H | IF | IGI | 1503 |
| 202 | 0.34 | F | VVS1 | IGI | 1773 |
| 203 | 0.34 | F | VVS2 | IGI | 1636 |
| 204 | 0.35 | F | VVS1 | IGI | 1821 |
| 205 | 0.35 | G | VVS2 | IGI | 1540 |
| 206 | 0.4 | G | IF | IGI | 2276 |
| 207 | 0.41 | I | VVS1 | IGI | 1616 |
| 208 | 0.41 | I | VVS2 | IGI | 1506 |
| 209 | 0.47 | F | VVS2 | IGI | 2651 |
| 210 | 0.48 | F | VS1 | IGI | 2383 |
| 211 | 0.5 | G | IF | IGI | 3652 |
| 212 | 0.51 | E | VVS2 | IGI | 3722 |
| 213 | 0.51 | F | VVS1 | IGI | 3722 |
| 214 | 0.52 | I | IF | IGI | 3095 |
| 215 | 0.55 | F | VVS2 | IGI | 3706 |
| 216 | 0.56 | E | VVS2 | IGI | 4070 |
| 217 | 0.56 | G | VVS2 | IGI | 3470 |
| 218 | 0.58 | E | VVS1 | IGI | 4831 |
| 219 | 0.58 | F | VVS1 | IGI | 4209 |
| 220 | 0.58 | G | VVS1 | IGI | 3821 |
| 221 | 0.7 | G | VVS1 | IGI | 5607 |
| 222 | 0.7 | G | VVS2 | IGI | 5326 |
| 223 | 0.71 | D | VS1 | IGI | 6160 |
| 224 | 0.76 | F | VVS2 | IGI | 6095 |
| 225 | 0.78 | G | VVS2 | IGI | 5937 |
| 226 | 1 | H | VVS2 | IGI | 9342 |
| 227 | 1.01 | G | VS1 | IGI | 9713 |
| 228 | 1.01 | H | VS2 | IGI | 8873 |
| 229 | 1.01 | I | VS1 | IGI | 8175 |
| 230 | 0.5 | F | VVS1 | HRD | 3778 |
| 231 | 0.5 | G | VVS1 | HRD | 3432 |
| 232 | 0.51 | F | VVS1 | HRD | 3851 |
| 233 | 0.52 | E | VS2 | HRD | 3346 |
| 234 | 0.52 | H | VVS1 | HRD | 3130 |
| 235 | 0.53 | F | VVS1 | HRD | 3995 |
| 236 | 0.53 | F | VVS2 | HRD | 3701 |
| 237 | 0.55 | G | VVS2 | HRD | 3529 |
| 238 | 0.56 | F | VS1 | HRD | 3667 |
| 239 | 0.56 | F | VS2 | HRD | 3202 |
| 240 | 0.57 | F | VS2 | HRD | 3256 |
| 241 | 0.57 | H | VVS1 | HRD | 3415 |
| 242 | 0.58 | H | IF | HRD | 3792 |
| 243 | 0.6 | G | VS1 | HRD | 3925 |
| 244 | 0.6 | G | VS2 | HRD | 3421 |
| 245 | 0.6 | H | VVS1 | HRD | 3925 |
| 246 | 0.61 | H | VVS2 | HRD | 3616 |
| 247 | 0.62 | I | VVS2 | HRD | 3615 |
| 248 | 0.64 | H | VVS2 | HRD | 3785 |
| 249 | 0.65 | I | VVS2 | HRD | 3643 |
| 250 | 0.66 | H | VVS1 | HRD | 4300 |
| 251 | 0.7 | E | VVS1 | HRD | 6867 |
| 252 | 0.7 | E | VVS2 | HRD | 6285 |
| 253 | 0.7 | G | VVS1 | HRD | 5800 |
| 254 | 0.7 | G | VVS2 | HRD | 5510 |
| 255 | 0.7 | H | VS2 | HRD | 4346 |
| 256 | 0.71 | G | IF | HRD | 6372 |
| 257 | 0.71 | H | VVS2 | HRD | 5193 |
| 258 | 0.72 | H | VVS1 | HRD | 5662 |
| 259 | 0.73 | F | VS2 | HRD | 5333 |
| 260 | 0.73 | G | VVS1 | HRD | 6041 |
| 261 | 0.74 | H | VVS1 | HRD | 5815 |
| 262 | 0.8 | F | IF | HRD | 8611 |
| 263 | 0.8 | F | VS1 | HRD | 6905 |
| 264 | 0.8 | G | VVS2 | HRD | 6905 |
| 265 | 0.8 | H | VVS2 | HRD | 6416 |
| 266 | 0.8 | H | VS1 | HRD | 6051 |
| 267 | 0.81 | E | VVS1 | HRD | 8715 |
| 268 | 0.81 | E | VS2 | HRD | 6988 |
| 269 | 0.81 | F | VS1 | HRD | 6988 |
| 270 | 0.81 | G | VS1 | HRD | 6495 |
| 271 | 0.81 | H | IF | HRD | 7358 |
| 272 | 0.82 | F | VS2 | HRD | 6572 |
| 273 | 0.82 | G | VVS2 | HRD | 7072 |
| 274 | 0.85 | F | VVS1 | HRD | 8359 |
| 275 | 0.85 | F | VS2 | HRD | 6805 |
| 276 | 0.85 | G | VVS1 | HRD | 7711 |
| 277 | 0.86 | H | VS2 | HRD | 5835 |
| 278 | 1 | D | VVS2 | HRD | 13775 |
| 279 | 1 | E | VVS1 | HRD | 14051 |
| 280 | 1 | E | VVS2 | HRD | 11419 |
| 281 | 1 | E | VS1 | HRD | 10588 |
| 282 | 1 | F | VVS1 | HRD | 11696 |
| 283 | 1 | F | VVS2 | HRD | 10588 |
| 284 | 1 | G | VVS1 | HRD | 10450 |
| 285 | 1 | G | VVS2 | HRD | 9896 |
| 286 | 1 | G | VS2 | HRD | 9203 |
| 287 | 1 | H | VVS1 | HRD | 9480 |
| 288 | 1 | H | VS1 | HRD | 9065 |
| 289 | 1 | H | VS2 | HRD | 8788 |
| 290 | 1 | I | VVS1 | HRD | 8788 |
| 291 | 1 | I | VVS2 | HRD | 8372 |
| 292 | 1 | I | VS1 | HRD | 8095 |
| 293 | 1 | I | VS2 | HRD | 7818 |
| 294 | 1.01 | D | VVS2 | HRD | 13909 |
| 295 | 1.01 | E | VVS2 | HRD | 11531 |
| 296 | 1.01 | E | VS1 | HRD | 10692 |
| 297 | 1.01 | F | VVS1 | HRD | 11811 |
| 298 | 1.01 | F | VS1 | HRD | 10272 |
| 299 | 1.01 | G | VVS2 | HRD | 9993 |
| 300 | 1.01 | G | VS2 | HRD | 9293 |
| 301 | 1.01 | H | VVS2 | HRD | 9433 |
| 302 | 1.01 | H | VS1 | HRD | 9153 |
| 303 | 1.01 | I | VVS1 | HRD | 8873 |
| 304 | 1.01 | I | VS1 | HRD | 8175 |
| 305 | 1.02 | F | VVS2 | HRD | 10796 |
| 306 | 1.06 | H | VVS2 | HRD | 9890 |
| 307 | 1.02 | H | VS2 | HRD | 8959 |
| 308 | 1.09 | I | VVS2 | HRD | 9107 |
Legend
| Data are for 308 round-cut diamonds, taken from a newspaper ad |
| Data were obtained from the Journal of Statistics Education data archive |
| IDNO - an identification number for each data point |
| WEIGHT - weight of the diamond, in carats |
| COLOR - degree of color purity in the diamond |
| "D" represents top color purity grade |
| Lesser grades are "E", "F", and so on, through the alphabet |
| CLARITY - diamond clarity (presence or absence of minute flaws) |
| "IF" means "internally flawless" - the top grade. No flaws visible under 10-power magnification |
| Other grades in descending order: |
| "VVS1" and "VVS2" for "very very slightly imperfect" |
| "VS1" and "VS2" for "very slightly imperfect" |
| RATER - the diamond was evaluated by one of three independent rating agencies |
| "GIA" - Gemmological Institute of America (based in New York) |
| "IGI" - International Gemmological Institute (Antwerp) |
| "HRD" - Hoge Raad Voor Diamant (Antwerp) |
| PRICE - in Singapore dollars |