null

The term null hypothesis arose from earlier agricultural and medical applic ation of statistics.

无效假设这个概念产生于早期的统计学在农业和医学方面的应用中.

A null - balance system is provided by balancing the magnetic forces by electrostatic forces.

零位平衡系统是靠静电力来平衡磁力而造成的.

The device provides extreme sensitivity through a small range around the null point.

此装置在零点附近很小一段范围内具有极高的灵敏度.

This check is null and void.

本支票无效.

This contract is null and void.

此合同无效.

A spokeswoman said the agreement had been declared null and void.

女发言人称该协议已宣布无效。

The court ruled that the claim was null and void.

法庭裁决此项要求无效.

The agreement will be considered null and void.

该协议将被视作无效。

The null result was directly related to a central postulate of the theory.

零结果都直接与理论的中心假设相联系.

The null result of the Michelson - Morley experiment suggests that the effects of the ether are undetectable.

迈克耳 孙- 莫雷实验的否定结果使人想到,以太的效应是不能检查到的.

This null - balance system is usually more accurate than the direct - readout bridge.

这种调零系统通常比直读电桥更精确.

The operator O is the null operator.

算符O是零算符.

Whenever we reject the null hypothesis, the conclusion we do accept is called the alternative hypothesis.

无论何时,拒绝无效假设时, 我们所接受的结论叫做备择假设.

When the galvanometer reads zero the circuit is in the null - balance position.

当检流计的读数为零时,电路处于零平衡位置.

The null subset corresponds to the term 1.

空集则对应于常数项1.