Answer
$H_{o}$: The standard deviation of the 18-hole scores for a golfer is greater than or equal to 2.1 strokes.
$H_{a}$: The standard deviation of the 18-hole scores for a golfer is less than 2.1 strokes.
$H_{o}: σ \geq 2.1$, $H_{o}: σ \lt 2.1$
Left-tailed because the alternative hypothesis contains less than sign.
Work Step by Step
As given above