#### Answer

Reject $H_{o}$ at α = 0.05
Sample mean is greater than 100.

#### Work Step by Step

$z = \frac{x̅ - µ}{σ/\sqrt n} = \frac{110 - 100}{60/\sqrt 100}$
z = 1.67
Since z > 1.645, reject $H_{o}$ at α = 0.05
From this we conclude that sample mean is greater than 100.