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Inferential Statistics

STATISTICAL INFERENCES

A factory unit producing cars chooses some for inspection and quality check by the quality control department. These cars are chosen randomly for the quality check, form a sample and the totality of the cars manufactured is called the population.

Population: The population is a collection of objects, both animate and inanimate, that is being studied.
Statistical individuals refer to objects in a population. The population can be finite or infinite depending on the number of things in the population.

Sample: A sample is a finite subset of statistical individuals (objects) in a population.
Sampling is a common practice in our day-to-day lives. We use sampling to help us with any statistical inquiry. For example, by analyzing certain samples of specific objects, we may be able to decide whether or not to accept or reject them. The acceptance or rejection of a sample or samples depending on their qualities, on the other hand, results in a sampling error.

Sample Size: The number of statistical individual…

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