## Statistics (12th Edition)

Reject $H_{o}$ at α = 0.05 Sample mean is greater than 100.
$z = \frac{x̅ - µ}{σ/\sqrt n} = \frac{110 - 100}{60/\sqrt 100}$ 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.