Test of statistical significance of the accuracy obtained under different acquisition times.

Note: df is degree of freedom; Sig. (2 tailed): the two tailed value probability value; y1 and y2: oil content ratio at measurement time of 1 and 2 s, respectively. The original data for this analysis is shown in Fig 8.

注释：df为自由度（degree of freedom）；Sig. (2 tailed)指双侧显著性检验概率值；y1与y2分别为测量时刻1秒和2秒时的含油率。本次分析的原始数据如图8所示。