In the context of post-test activities, which of the following best defines the primary goal of data validation?

1. To convert all raw data from sensor units (e.g., volts) into final engineering units (e.g., psi).
2. To archive the complete raw dataset in a secure, long-term storage repository.
3. To ensure the collected data is complete, accurate, and free of known errors before it is used for formal analysis.
4. To generate the final test report and distribute it to all stakeholders.