Example 2: Is there reason to believe that a relationship exists between heights of fathers and the heights of their sons? To answer this question, use the following data in Figure 10.4, obtained from a random sample of 10 men and their sons. Test at the 5% level of significance. 1 2 355 6 7 8 9 10 Father_Height 65 64 68 73 72 67 71 75 70 69 Sons_Height 66 63 69 72 73 66 72 75 69 70 Figure 10.4 Heights of 10 randomly selected men and their sons.