(x,y) is the sample selected from an unknown arbitrary two-dimensio- nal population independently with equal probability. Estimates are for the population characteristics.
Total frequency= | Least squares regression line y=a+bx ....Variable......Variable.......Frequency .......x.....................y......................f . 1 . 2 . 3 . 4 . 5 . 6 . 7 . 8 . 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | Least squares regression line y=a+bx ....Variable......Variable.......Frequency .......x.....................y......................f 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | Least squares regression line y=a+bx ....Variable......Variable.......Frequency .......x.....................y......................f 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 |