As seen in Huffington Post:
"While everyone wants to appear confident and capable, odd verbal tics and off-putting body language can jeopardize your chances of establishing or maintaining business relationships. So what habits should you ditch?
A. Ending a Sentence With a Rising Pitch
Many otherwise capable people end their sentences with a rising pitch rather than a lowered one. This sends the (often subconscious) message that you’re not confident or that you’re questioning what you say (we raise our pitch at the ends of questions). Speak slower and with a lowered tone at the end in order to sound confident and final. - Brennan White, Cortex"
Read all the answers and the full post on Huffpo.