最近投了一篇文章，是关于农户分类的。文章大概是把农户分为纯农户、兼业型农户和非农就业户，然后比较这些不同类型农户的收入、土地、资产、劳动力等方面。这些方面都是统计了不同类型农户的平均值，然后进行对比分析。审稿专家对此的意见其中有一条是：
Giving average numbers (of ha for instance) is meaningless if no measure of variation is added - not clear whether the apparent difference between types is a statistical significant one. The overall percent difference is not helpful. At which level of significance was the difference of land per labor tested (add the p-value)?
英语我读懂了，但是如何measure of variation ？是不是就是SPSS中的variance？在表格中除了统计平均值再加上variance就可以了吗？还有“At which level of significance was the difference of land per labor tested (add the p-value)”，这个怎么实现?本人数学学得实在差，请好心高手指点一下。谢谢！