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. 2009 Oct 28;4(10):e7573. doi: 10.1371/journal.pone.0007573

Figure 4. Evolution of factor Ht from 1897 to 2008:

Figure 4

yearly, Home WR over the WR total. Ht increases from 1897 to 1946 (Linear Model: y = 0.013x−24.71, F (1, 48) = 23.53, p = 0.01), and decreases since 1947 (Linear Model y = −0.0095x+19.18, F (1, 60) = 143 p<0.001).