Keep the results a secret. Do the math without a calculator. Change all of the variables in the experiment. Ask other scientists to attempt to reproduce the results.
What should a scientist do to help make sure the results of an experiment are unbiased?

Options:
- Keep the results a secret.
- Do the math without a calculator.
- Change all of the variables in the experiment.
- Ask other scientists to attempt to reproduce the results.

Ask other scientists to attempt to reproduce the results.