Symbol

Description

Unit

A

Actual observed value

1

T

Theoretical inferential value

1

$r_{ij}$

Coefficient of correlation between variable x_i and x_j

1

$\rho$

Resolution coefficient

1

$r_i$

Comparison of correlation between sequence and reference sequence

1

${\chi }^2$

The amount of difference between variables of a given class

1

$x_i$

Chemical component i content

1

$y_i$

The content normalized by normal distribution is used

1