Psychologists often measure how long it takes mice to find

Last updated: 6/29/2023

Psychologists often measure how long it takes mice to find their way through a maze The times for one particular maze follow an approximately Normal distribution with mean 18 seconds and standard deviation 3 seconds A researcher thinks that a loud noise will cause mice to complete the maze faster but not change the standard deviation She uses a loud noise to stimulate each of 10 mice right before she measures how long it takes each of them to complete the maze The sample mean is 16 2 seconds The appropriate null and alternative hypotheses for this test are Ho 18 seconds Ha 18 seconds The sample result is a not statistically significant at any level b statistically significant at the 5 level but not at the 2 level c proves that the mean time after a loud noise has changed to 116 2 seconds