Aresearcher for an airline interviews all of the passengers on five randomly selected flights. identify which sampling technique is used.. 1). stratified. 2). convenience. 3). cluster. 4). random

2) Cluster sampling

Step-by-step explanation:

Cluster sampling is a type of sampling technique in which the researcher divides the entire population into separate clusters (groups).

Then he select a simple random sample of clusters from the population.

Given : A researcher for an airline interviews all of the passengers on five randomly selected flights.

Here flights are the clusters .

Therefore the sampling technique is used : Cluster sampling

4th option is correct xy=-10

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$97520

step-by-step explanation:

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