In each question identify the population and the sample then describe the sampling method that was used.

A machinery manufacturer purchases voltage regulators from 10 different suppliers. There are reports that variation in the output voltage of the regulators is affecting the performance of the finished products. To assess the quality of the suppliers’ production, the manufacturer sends a random sample of 5 regulators from each of his suppliers’ last shipments to a lab for study.

A method of sampling that requires the division of a population into smaller groups known as strata is known as the Stratified random sampling. In this sampling method, the strata are formed based on the attributes or characteristics shared by the members.

akposevictor akposevictor · Answer 2 · 2021-10-29T19:21:16+02:00

From the given information about a research that was carried out, the following can be identified:

Population: the entire voltage regulators purchased from 10 different suppliers

Sample: 5 regulators purchased from each of the 10 suppliers.

Sampling Method: cluster sampling

Population in a research study consists of all individuals the study that falls under consideration in a study, and have similar characteristics.

For example, the population that can be identified from the information given is: the entire voltage regulators purchased from 10 different suppliers.

The sample of a population is a sub-set of the entire population under study.

For example, the sample from the given information consist of the: 5 regulators purchased from each of the ten suppliers.

The sampling method is the method used in choosing from an entire population the research subjects you want to observe or study directly.

For example, cluster sampling method was used here since each supplier serves as a stratum.

In summary, from the given information about a research that was carried out, the following can be identified:

Population: the entire voltage regulators purchased from 10 different suppliers

Sample: 5 regulators purchased from each of the 10 suppliers.

Sampling Method: cluster sampling

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