Statement-1: Down the group, electronegativity decreases from B to Tl.

Statement-2: Electronegativity of an element depends on its electron affinity and ionisation energy.

Group 13's electronegativity gradually increases from B to Al after first decreasing from B to Al.
A low ionisation energy means that an element quickly donates electrons to a process, whereas a high electronegativity implies that an element actively wants to absorb electrons in a reaction. This makes the ionisation energy a kind of counter attribute to electronegativity.