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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Pearson’s Chi-squared test of independence. The first column denotes the sub-categories, and the second column displays the corresponding statistical results in terms of p-values. The significant codes are as follows: * significance at 10%, ** significance at 5%, and *** significance at 1%.