18. 19. 20. Suppose you surveyed a random sample of 72 students and a value of Pearson r of -0.25 was calculated for the relationship between age and number of downloaded songs. At the .05 level of significance, did you nd a statistically significant relationship between the variables? A. Yes B No Suppose a researcher conducts a correlational study with 92 individuals. At the .05 level of significance, what critical value should the researcher use to determine if significance was obtained? A. .21 B. .20 C. .22 D. none of the above Suppose a student got a score of 6 on X. If Y = 1.42 + 1.72X, what is the student's predicted score on Y? A. 8.90 B. 18.84 C. 11.74 D. 13.49 Critical Table 10 Values for Significance of a Pearson r 05 df .01 001 .05 .01 .001 level level level df level level level .996 999 999 40 .304 .393 490 .950 990 .999 45 .288 .372 .465 .878 959 .991 50 .273 .354 .443 NaUAWNA .811 917 .974 60 .250 .325 .408 .754 .874 .951 70 .232 .302 .380 .707 834 925 80 .217 .283 .357 .666 .798 .898 90 .205 .267 .338 8 .632 .765 .872 100 .195 .254 .321 a .602 735 847 10 .576 .708 .823 11 .553 684 .801 12 .532 .661 .780 13 .514 .641 .760 14 .497 .623 .742 15 482 606 .725 16 .468 .590 .708 17 .456 .575 .693 18 .444 561 .679 19 .433 549 665 20 .423 537 .652 25 .381 487 .597 30 .349 .449 .554 35 .325 .418 .519 Abridged from Fisher, R. A., & Yates, F. (1963). Statistical tables for biological, agriculturalhands medical research, Edinburgh: Oliver & Boyd Ltd.Table 1 Abbreviated Table of the Normal Curve Col. Col. Col. Col. Col. Col. Col. Col. Col. Col. Col. Col. 1 2 3 4 1 2 3 4 1 2 3 4 smaller part from M to z smaller part from M to z % of cases smaller part larger part % of cases % of cases larger part from M to z % of cases % of cases larger part % of cases of cases % of cases % of cases z-score z-score z-score 0.00 0.00 50.00 50.00. 1.20 38.49 88.49 |11.51 2.40 49.18 99.18 0.82 0.05 1.99 51.99 48.01 1.25 39.44 89.44 10.56 2.45 49.29 99.29 0.71 0.10 3.98 53.98 46.02 1.30 40.32 90.32 9.68 2.50 49.38 99.38 0.62 0.15 5.96 55.96 44.04 1.35 41.15 91.15 8.85 2.55 49.46 99.46 0.54 0.20 7.93 57.93 42.07 1.40 41.92 91.92 8.08 2.60 49.53 99.53 0.47 0.25 9.87 59.87 40.13 1.45 42.65 92.65 7.35 2.65 49.60 99.60 0.40 0.30 11.79 61.79 38.21 1.50 43.32 93.32 6.68 2.70 49,65 99.65 0.35 0.35 13.68 63.68 36.32 1.55 43.94 93.94 6.06 2.75 - 49.70 99.70 0.30 0.40 15.54 65.54 34.46 | 1.60 44.52 94.52 5.48 2.80 49.74 99.74 0.26 0.45 17.36 67.36 32.64 1.65 45.05 95.05 4.95 2.85 |49.78 99.78 0.22 0.50 19.15 69.15 30.85 1.70 45.54 95.54 4.46 2.90 49.81 99.81 0.19 0.55 20.88- 70.88 29.12 1.75 45.99 95.99 4.01 2.95 49.84 99.84 0.16 0.60 22.57 72.57 27.43 1.80 46.41 96.41 3.59 3.00 49.87 99.87 0.13 0.65 24.22 74.22 25.78 1.85 46.48 96.78 3.22 Values of Special Interest 0.70 25.80 75.80 24.20 1.90 47.13 97.13 2.87 1.96 47.50 97.50 2.50 0.75 27.34 77.34 22.66 1.95 47.44 97.44 2.56 2.58 49:51 99.51 0.49 0.80 28.81 78.81 21.19 2.00 47.72 97.72 2.28 0.85 30.23 80.23 19.77 2.05 47.98 97.98 2.02 0.90 31.59 81.59 18.41 2.10 48.21 98.21 1.79 0.95 32.89 82.89 17.11 2.15 48.42 98.42 1.58 1.00 34.13 84.13 15.87 2.20 48.61 98.61 1.39 1.05 35.31 85.31 14.69 2.25 48.78 98.78 1.22 1.10 36.43 86.43 13.57 2.30 48.93 98.93 1.07 1.15 37.49 87.49 12.51 2.35 49.06 99.06 0.94X2 Y2 XY A 00 1
