Crossword Puzzle Bell-curve feature

Clue: Bell-curve feature

Bell curve center (MEAN with 4 letters)
Curved pipe feature (AIRTRAP with 7 letters)
Bell curve peak (NORM with 4 letters)
Points on bell curves (AVERAGES with 8 letters)
Curved flat piece of wood made a sound like a bell? (BOOMERANGRANG with 13 letters)
Common belly feature (INNIE with 5 letters)
Bell curve, e.g. (GRAPH with 5 letters)
Bella Abzug feature (HAT with 3 letters)
Belly feature (NAVEL with 5 letters)
Its flag features a curved dagger (OMAN with 4 letters)