“systematic sampling”的概念、定义、翻译、参考文献-科学参考

systematic sampling

Mathematics

Choose a number at random from 1 to n, and then take every nth value thereafter. This means that all units have an equal chance of being selected, but it does not constitute a random sample, as not all combinations are equally likely. There is a particular danger with this method, especially for ‘production line sampling’ as any faults with a particular machine in the system will affect items regularly, and the systematic method of choosing the items to be sampled means that you are very likely either to miss them all or hit them all (or some fraction of them).

Statistics

A method of choosing a sample from a sampling frame of size N. It is assumed that a list exists of the individuals in the frame, the two ends of the list being notionally joined. One unit is chosen at random from the list and then every kth unit thereafter is chosen for the sample (continuing counting from the start of the list when the end is reached) until the desired sample size is reached. The number k can be chosen so that N/k is approximately equal to the desired sample size.

Biology

See sampling.

Geology and Earth Sciences

See sampling methods.

单词	systematic sampling
释义	systematic sampling Mathematics Choose a number at random from 1 to n, and then take every nth value thereafter. This means that all units have an equal chance of being selected, but it does not constitute a random sample, as not all combinations are equally likely. There is a particular danger with this method, especially for ‘production line sampling’ as any faults with a particular machine in the system will affect items regularly, and the systematic method of choosing the items to be sampled means that you are very likely either to miss them all or hit them all (or some fraction of them). Statistics A method of choosing a sample from a sampling frame of size N. It is assumed that a list exists of the individuals in the frame, the two ends of the list being notionally joined. One unit is chosen at random from the list and then every kth unit thereafter is chosen for the sample (continuing counting from the start of the list when the end is reached) until the desired sample size is reached. The number k can be chosen so that N/k is approximately equal to the desired sample size. Biology See sampling. Geology and Earth Sciences See sampling methods.
随便看	opsonin opsonization optical activity optical ammeter optical axis optical brightener optical card optical centre optical character reader optical character recognition optical computing optical continuity optical density optical depth optical disk optical disk library optical double optical electronics optical emission spectroscopy optical emission spectrum optical fibre optical flat optical flow optical font optical glass