## Introduction to Sampling

In our daily life we often must examine some given material. We examine fruits before we purchase them, and we… Click here to read more

From basic to higher mathematics

In our daily life we often must examine some given material. We examine fruits before we purchase them, and we… Click here to read more

Population The word population or statistical population is used for all the individuals or objects which we must study. We… Click here to read more

Sample Any part of a population is called a sample. A study of a sample enables us to make some… Click here to read more

Complete Count If we collect information about all individuals in a population, the study is called a complete count or… Click here to read more

If it is not essential to conduct a complete enumeration, then a sample of some suitable size is selected from… Click here to read more

Sometimes, information about each and every unit of the population is required. This is possible only through complete enumeration, because… Click here to read more

Sample Design In sample studies, we have to make a plan regarding the size of the sample, selection of the… Click here to read more

Equal Probability The term equal probability is frequently used in the theory of sampling. This term is quite often not… Click here to read more

The term probability sampling is used when the selection of the sample is purely based on chance. The human mind… Click here to read more

Sampling is called with replacement when a unit selected at random from the population is returned to the population and… Click here to read more

Sampling is called without replacement when a unit is selected at random from the population and it is not returned… Click here to read more

Simple random sample (SRS) is a special case of a random sampling. A sample is called simple random sample if… Click here to read more

Suppose we are interested in the value of a population parameter, the true value of which is $$\theta $$ but… Click here to read more

There are certain sources of errors which occur both in sample surveys as well as in the complete enumeration. These… Click here to read more

Suppose we have a finite population and we draw all possible simple random samples of size $$n$$ without replacement or… Click here to read more

Example: Draw all possible samples of size 2 without replacement from a population consisting of 3, 6, 9, 12, 15…. Click here to read more