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Table 2.9 gives data on mean Scholastic Aptitude Test (SAT) scores for college-bound seniors for 1967-1990.
a. Use the horizontal axis for years and the vertical axis for SAT scores to plot the verbal and math scores for males and females separately.
b. What general conclusions can you draw?
c. Knowing the verbal scores of males and females, how would you go about predicting their math scores?
d. Plot the female verbal SAT score against the male verbal SAT score. Sketch a regression line through the scatterpoints. What do you observe?
TABLE 2.9 MEAN SCHOLASTIC APTITUDE TEST SCORES FOR COLLEGE-BOUND SENIORS, 1967-1990*
Verbal
Math
Year
Males
Females
Total
1967
463
468
466
514
467
492
1968
464
512
470
1969
459
513
493
1970
461
460
509
465
488
1971
454
457
455
507
1972
452
453
505
484
1973
446
443
445
502
481
1974
447
442
444
501
480
1975
437
431
434
495
449
472
1976
433
430
497
1977
427
429
1978
425
494
1979
423
1980
428
420
424
491
1981
418
1982
421
426
1983
1984
471
1985
499
475
1986
451
1987
435
500
476
1988
422
498
1989
1990
419
*Data for 1967-1971 are estimates.
Consider three advanced market capitalism economies
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