4. Researchers (Wang et al., 2002) were examining bone strength. They collected 10 cadaver femurs from subjects in three age groups: young (19-49 years), middle-aged (50-69 years), and elderly (70 years or older). [Note: one value was missing in the middle-aged group.] One of the outcome measures (W) was the force in Newtons required to fracture the bone. The following table shows the data for the three age groups. Young Middle-Aged Elderly 103.6 125.4 59 137.5 126.5 87.2 122 115.9 84.4 145.4 98.8 78.1 117 94.3 51.9 105.4 99.9 57.1 99.9 83.3 54.7 74 72.8 78.6 74.4 83.5 53.7 112.8 96 Is there a difference in bone strength between age groups? Let a = .05. If you conclude there's a difference, check for significant differences between pairs using the same a value