A market researcher selects 500 drivers under 30 years of age and 500 drivers over 30 years of age. Identify the type of sampling used in this example.

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Tommy

Mathematics

30 August, 17:04

A market researcher selects 500 drivers under 30 years of age and 500 drivers over 30 years of age. Identify the type of sampling used in this example.

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Fernando Doyle · Answer 1

The type of sampling is stratified.

Step-by-step explanation:

Samples types are classified as:

Random: Basically, put all the options into a hat and drawn some of them.

Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.

Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.

Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.

In this problem, we have that:

The drivers are divided into two groups according to their ages.

There are thousands and thousand of drivers both under and over 30 years of age, and 500 for each group (some elements of the group) are selected.

So the type of sampling is stratified.