Question

In a measurement, both positive and negative errors are found to occur with equal probability. The type of error is known as

• A. Proportional error
• B. Systematic error
• C. Determinate error
• D. Random error

Answer 1

The correct option is D Random error

The most important features of random errors which usually occur are:
$\left(1\right).$ Small errors tend to be more frequent than the large ones. So that they are the most probable.
$\left(2\right).$ Positive and negative errors of the same size happen with equal frequency. That's why they are equally probable.
$\left(3\right).$ Large errors occur infrequently and are impossible.
Hence, option $\left(d\right)$ is the correct answer.