Answer:
Any measurement greater than 14.5 or less than 11.5 mm.
Step-by-step explanation:
The specification indicates the nominal value and tolerance from nominal.
13 + 1.5 = 14.5
13 - 1.5 = 11.5
Any measurement above 14.5 or below 11.5 mm would be considered 'out of spec', and therefore rejected.