Table 2 The Pearson correlation coefficient value (R) and corresponding correlation levels.

|R|= 0

Absence of correlation

0 <|R|< 0.2

Very weak correlation

0.2 <|R|< 0.4

Weak correlation

0.4 <|R|< 0.6

Medium correlation

0.6 <|R|< 0.8

Strong correlation

0.8 <|R|< 1

Very strong correlation

|R|= 1

Complete correlation