Experiments on learning in animals sometimes measure how lon

Experiments on learning in animals sometimes measure how long it takes mice to find their way through a maze. The mean time is 18 seconds for one particular maze. A researcher thinks that a loud noise will cause the mice to complete the maze faster. She measures how long each of 10 mice takes with a noise as stimulus. The sample mean is x = 16.5 seconds. The alternative hypothesis for the significance test is

Solution

alternative hypothesis has strict inequality, and all hypothesis compare parameter with test value not sample value.