Adjustments suggested by Sheppard for the values of the moments of the sample when these are calculated from grouped data. For example, with class intervals of width d, the correction to the calculated estimate of the variance is to subtract d2/12.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。