sample survey造句

1、But I do know a few things. I know that the cost of every U. s. sample survey is going up.
但是我对情况也略知一二，我知道每个样本调查费都在增加。

2、MethodsCarried out a sample survey of 150 health care personnel hand-washing behavior.
方法对150名医护人员的洗手行为进行抽样调查。

3、Note: figures in this table are sample figures in 2006 sample survey on population change.
注：本表数据为2006年人口变动情况抽样调查样本数据。