As part of the quality control process associated with the assembly of a particular electronic component, the assembly line is closed down for maintenance if the average assembly time is greater than 15 seconds.The hypotheses summarising this process can be written as follows:

Ho: = 15

Ha: > 15

Which of the following best describes a Type II error in the context of this question?

Leaving the assembly line running when it should be closed down.

Closing the assembly line down unnecessarily.

Incorrectly rejecting Ho

None of these choices is correct.

Incorrectly retaining Ho.