对１１４５Ｍ电缆铝箔（厚０１５～０２ｍｍ）的１０批产品１３２个试样进行了对比试验和统计分析，结果表明：侧边粗糙度不符合国家标准的条形非标准试样的延伸率与标准试样的延伸率显著不同，二者的差值符合正态分布，期望值为６８％，方差为１９％，按９０％的置信度落在（６８４±３１５）％范围内，相当于标准试样延伸率期望值的（３４８±１６）％。如用户按非标准试样测得的延伸率的数值δＢ，可按９５％置信度按δＡ＝δＢ×（１５３＋１５－１３）％估计标准试样的延伸率δＡ的数值。 132 samples of 10 batches of 1145M cable aluminum foil (thickness 015 ~ 02mm) were compared and statistically analyzed. The results show that the extension of the non-standard strip with non-standard roughness The rate of elongation is significantly different from that of the standard sample. The difference between the two is in accordance with the normal distribution with the expected value of 68% and the variance of 19%, with a confidence level of 90% (684 ± 3 15)%, which is equivalent to (34.8 ± 16)% of the expected value of the standard sample elongation. If the user according to the non-standard specimen measured elongation value δB, according to 95% confidence level δA = δB × (153 + 15-13)% estimated standard sample elongation δA value.