Table 6 Correlation between total acidity and scattering capability.

From: Non-contact measurement method of liquid composition using microwave radar cross-section

Group

Index

\({{\varvec{x}}}^{1}\)

\({{\varvec{y}}}^{1}\)

\({{\varvec{x}}}^{2}\)

\({{\varvec{y}}}^{2}\)

\({{\varvec{x}}}^{3}\)

\({{\varvec{y}}}^{3}\)

1

\({x}^{1}\)

1

0.548**

0.745**

0.730**

0.762**

0.379**

\({y}^{1}\)

0.548**

1

0.151

0.030

0.434**

0.622**

2

\({x}^{2}\)

0.745**

0.151

1

0.826**

0.690**

−0.106

\({y}^{2}\)

0.730**

0.030

0.826**

1

0.700**

−0.152

3

\({x}^{3}\)

0.762**

0.434**

0.690**

0.700**

1

0.194*

\({y}^{3}\)

0.379**

0.622**

−0.106

−0.152

0.194*

1

  1. Note: **. Significant at the 0.01 level (two-tailed); *. Significant at the 0.05 level (two-tailed).