Difference between「と思います」and「かと思います」?

Question

What is the difference in meaning and usage between「と思います」and「かと思います」at the end of a sentence?

Answer 1

と思います is stating one's thoughts out flat.

かと思います is making a question and implying doubt, so it's more like "I'm wondering if ~."

With question words it implies something is unusual or unexpected.