8. During the voltammetric determination of copper in tomato juice in two laboratories, the results were obtained (mg / kg):
Laboratory No. 1: 0.28; 0.26; 0.22; 0.26; 0.24;0.23
Laboratory No. 2: 0.27; 0.24; 0.28; 0.26; 0.26; 0.25; 0.25
Determine by t-test whether there is a significant difference between the analysis data of both laboratories.

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