Statement I: All F-S-F angles in SF₄ are greater than 90° but less than 180°.
Statement II : The lone pair -bond pair repulsion is weaker than bond pair–bond pair repulsion.

Lone pair causes more repulsions than bond pair . To mimimize the repulusions the only lone pair in SF₄ molecule occupies equatorial position.
The  ${\mathrm{F}}_{\mathrm{e}}-\mathrm{S}-{\mathrm{F}}_{\mathrm{e}}$  is expected to be 90° and ${\mathrm{F}}_{\mathrm{a}}-\mathrm{S}-{\mathrm{F}}_{\mathrm{a}}$ is expected to be 180°
But to over come the repulsions caused by lone pair all the bond pairs come closer to each other and the resulting shape of SF₄ molecule is distorted tetrahedral (sea saw) (OR) Z - shaped
SF₄ molecule now can be represented as
 

$\therefore$ I is ture, II is false