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Chapter 10.MCRegression DataSet8 Q2 (Requires StatTools) Create table of correlations between all variables, and then run two regressions: the first of Y versus the X

Chapter 10.MCRegression DataSet8 Q2

(Requires StatTools) Create table of correlations between all variables, and then run two regressions: the first of Y versus the X with the highest correlation (in magnitude) with Y, and the second of Y versus the three X's with the highest correlations (in magnitude) with Y. Which of the following is true?

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a. Let X be the variable in the first equation. The absolute difference between its regression coefficients in the two equations is about 0.662.
b. The R-square value is about 25.3% larger in the second equation than in the first, i.e., the ratio of the two R-squares is about 1.253.
c. The standard error of estimate in the second equation is about 56.1% as large as in the first equation.
d. All of these choices are true
Y X1 X2 X3 X4 X5 X6 X7 X8
76 240 379 226 332 324 233 99 579
92 243 387 223 210 324 208 105 454
89 229 336 221 233 319 210 103 542
77 252 456 221 261 310 234 94 410
72 265 483 227 257 373 231 95 461
61 279 514 218 291 442 248 93 607
78 235 432 224 300 344 211 85 400
61 271 446 220 351 422 246 84 520
63 276 417 225 337 425 252 84 448
87 241 460 221 229 323 212 95 396
79 223 474 219 310 328 240 102 507
80 257 301 219 305 345 204 96 363
75 258 421 213 324 334 249 102 458
86 234 384 224 249 339 232 103 530
83 225 404 226 255 341 231 94 516
83 238 264 221 343 316 190 90 504
81 251 310 222 236 343 228 98 489
90 222 351 221 272 351 194 100 537
86 236 360 227 303 313 225 98 474
68 256 370 218 239 378 244 79 614
73 247 534 223 331 359 199 92 526
79 257 344 224 258 365 218 96 497
74 237 308 223 252 365 246 92 629
109 194 316 224 201 311 201 110 389
82 248 437 224 281 306 235 101 408
83 225 409 222 269 377 209 99 384
85 246 313 217 240 328 219 100 514
95 231 381 226 231 314 185 105 451
95 215 305 227 207 356 226 104 377
67 231 365 220 254 417 257 92 606
72 243 444 224 325 340 217 92 598
63 272 576 226 279 392 239 91 572
99 235 295 226 259 303 233 106 483
104 221 375 219 202 291 183 106 476
86 242 321 222 294 318 199 104 470
65 253 441 224 288 402 250 81 562
62 274 355 216 334 366 259 88 538
96 211 339 226 263 321 201 103 339
88 246 343 225 221 349 215 98 560
80 232 430 224 227 348 238 100 420
91 229 377 224 265 302 213 97 469
98 220 480 222 185 334 181 108 455
69 261 428 222 370 387 239 100 519
94 227 292 225 283 304 214 103 368
100 226 347 218 192 307 232 106 295
71 247 399 226 298 383 243 91 444
65 270 463 225 296 363 252 85 437
81 246 415 220 218 353 222 101 513
87 218 433 221 170 354 215 98 557
69 269 328 223 316 346 235 82 553
88 237 395 222 231 336 236 109 536
66 254 405 226 290 389 243 78 555
75 234 382 223 306 409 207 96 490
88 224 456 215 189 332 228 101 441
93 260 273 223 195 315 186 97 427
77 255 423 225 242 329 241 100 511
97 232 286 222 215 321 230 107 413
74 257 359 221 321 382 227 102 546
70 261 492 216 277 379 250 91 392
102 208 411 225 244 326 177 107 528
73 245 419 219 226 374 244 90 434
67 264 465 227 314 391 208 87 550
90 244 389 226 246 337 205 102 371
125 211 284 223 196 308 168 110 432
85 262 332 217 206 318 203 97 491
91 248 257 221 249 335 202 104 533
70 259 497 220 234 399 220 87 494
66 259 401 214 299 414 255 94 577
79 245 372 221 275 331 211 94 424
93 217 324 220 217 350 232 106 352
60 266 486 227 347 438 258 77 466
59 268 558 221 289 451 245 75 592
81 227 451 218 278 326 242 99 417
71 243 527 225 308 384 216 86 497
70 236 498 224 293 430 241 97 544
64 253 471 222 329 411 221 83 569
69 254 546 223 273 371 224 83 586
67 249 357 225 354 397 238 87 585
72 250 368 228 302 361 236 93 567
84 239 390 227 223 347 226 101 478
76 250 476 225 245 357 247 101 438
111 204 299 225 180 297 206 105 333
106 213 317 223 266 296 196 107 301
64 275 523 216 287 375 229 88 596
78 239 407 220 268 360 213 88 405
100 216 325 216 159 352 192 111 549
63 266 508 222 319 404 254 90 509
75 242 503 225 285 387 197 93 481
82 241 392 219 270 357 223 95 423
70 267 347 219 317 369 224 93 448
74 251 439 223 275 368 222 95 486
66 263 449 220 261 405 253 89 503
93 228 366 222 263 330 195 108 575
84 238 330 225 250 361 223 104 380
77 263 363 223 283 342 227 97 473
76 252 396 218 241 394 216 96 463
80 233 337 227 313 338 237 99 500
73 255 424 224 307 370 220 89 523
102 221 281 220 222 300 221 105 353
106 230 352 217 211 312 189 108 321

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