[Martin Tell]

I could come up with a completely different questionnaire regarding what constitutes a "biblical" worldview.

It would have been more honest to just say, "X% of the polling sample agreed with the following statements."

Or they could have been even more honest and stated, "X% of the polling sample agreed with how we interpret certain passages in the Bible."

[Arguendo]

Which of the principles listed is not necessary for a biblical worldview? Which could you add that would be universally recognized by orthodox Christian scholars?

A principle like "a person cannot earn their way into Heaven by trying to be good or do good works" is not merely one interpretation of certainly Bible passages; it's a fundamental tenet of Christianity.