What is the numeric range of a 16-bit twos complement value? A 16-bit excess notation value? A 16-bit unsigned binary value?

twos complement value is (-2^15 - 1) - 32768 to 32767.

excess notation value is - 32768 to 32767.

unsigned binary value is (2^16) 0 to 65535

Explanation:

Excess notation: used to represent signed integers. Always uses fixed number of bits with leftmost representing the sign.

Twos complement notation: As opposed to excess notation, a sign bit of 0 is used to represent the non-negative (+) sign and a 1 for the negative (-); again, zero is included in the non-negative set.

Unsigned Binary values: are binary values/bits that don't have signs