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A false positive has a $0.08$ percent chance of occurring.

We can't foresee the outcomes of a chance process, yet they have a regular distribution over a large number of repetitions. According to the law of large numbers, the fraction of times a specific event occurs in numerous repetitions approaches a single number. The likelihood of a chance outcome is its long-run relative frequency. A probability is a number between $0$ (never happens) and $1$ (happens frequently) (always occurs).

The fraction of times an answer occurs is called a relative frequency, and it is calculated by dividing each frequency by the total number of students in the sample.

That is correct $$\begin{gathered} =0.08x100 \\ =8\% \end{gathered}$$

This probability is calculated as a long-run relative frequency by using a polygraph machine on a group of people who are all telling the truth. The machine will say that the people are lying around $8\%$ of the time.

The fraction of times an answer occurs is called a relative frequency, and it is calculated by dividing each frequency by the total number of students in the sample. Claiming someone is lying while they are stating the truth appears to be a more dangerous error than a false positive or false negative.