Dr Spock want to know if a new drug called Omega significant

Dr. Spock want to know if a new drug called Omega significantly decreases the time it takes rats to move through a maze. He has a colony of 100 genetically identical mice. Half are randomly assigned to Omega and half are assigned to a placebo. Test whether the drug decreases the time rats are in the maze.  

Data do not meet assumptions of normality, which nonparametric test do you use?

Mean time rats given the placebo: 40 seconds with a standard deviation of 2.

What statistical test will you use?

Mann Whitney U Test

I think its the Mann Whitney or the 2 population sign Test.

Solution

Mann Whitney Test

The Mann Whitney Test is a non-parametric statistical hypothesis test used when comparing two independent samples.