Table 8. Spearman correlation for female informants from Dawarian and Rati Gali, AJK, Pakistan.

Age	Number of species	d 1	Number of uses	d 2	d = d 2−d 1	d2
24	11	2	13	1	−1	1
35	14	5	18	4	−1	1
45	18	7	20	6	−1	1
54	10	1	15	2	1	1
65	12	3	16	3	0	0
75	13	4	19	5	1	1
84	15	6	22	7	1	1

Sum of value of d² = 6 $r_{\text{c}}=1-\frac{\left[6^{\sum {\text{d}}^2}\right]}{\text{n}\left({\text{n}}^{\text{2}}-1\right)};r_{\text{c}}=1-\frac{\left[6\times 6\right]}{7\left(7^2-1\right)};r_{\text{c}}=1-\frac{\left[36\right]}{7\left(49-1\right)};r_{\text{c}}=1-\frac{\left[36\right]}{7\left(48\right)};r_{\text{c}}=1-\frac{\left[36\right]}{336}$; r_c = 1−[0.107]; r_c = 1−0.107; r_c = 0.893.