r_{ab}=\frac{\sum_{n}^{i=1}\left(a_i-\overline{A}\right)\left(b_i-\overline{B}\right)}{\sqrt{\sum_{n}^{i=1}\left(a_i-\overline{A}\right)^{2}}\sqrt{\sum_{n}^{i=1}\left(b_i-\overline{B}\right)^{2}}} > 0.7
rab=√∑ni=1(ai−A)2√∑ni=1(bi−B)2∑ni=1(ai−A)(bi−B)>0.7