According to the type of samples that were taken from the experiment, it is inferred that the 60 selected samples represent a random sample because they were randomly selected.
<h3>What is a sample?</h3>
A sample is a term that refers to a subset of data selected from a total of data obtained in an investigation.
For example, when a researcher wants to study the population of a city, it is a difficult task to study all the people, so he may study a sample of people to draw a conclusion.
According to the above, if the researchers take a sample of 60 recordings of the heart rate of the diving birds, it can be considered a valid sample because it is random and will allow conclusions to be drawn regarding the experiment.
