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The body temperatures of five subjects were recorded at two different times; 8AM and 12 AM.

The listed temperatures were taken from researchers of the University of Maryland.

Suppose the data is collected for a sample in such a way that it is not representative of the population or contains values that are not random. In that case, the observations can be regarded as being taken from a biasedsource.

In the context of this study, it is known that few university researchers were the participants of the study; that is, the body temperatures were collected from the researchers of the study.

As the subjects recorded for the study were themselves conducting the study, the data is highly likely to be biased.

It is not a truly random sample and can lead to inaccurate results.

Thus, it can be concluded that the source of data is biased.