We wish to determine if two strains of laboratory rats differ in maze-running ability. Random samples of naive (never been experimented on) rats are selected from each strain, and each rat is run through a test maze until it can negotiate the maze with no errors on two consecutive trials. The following results are obtained (number of trials to learn):
Apply the Mann-Whitney test. Use

Interpret the outcome using appropriate descriptive statistics.

Question

We wish to determine if two strains of laboratory rats differ in maze-running ability. Random samples of naive (never been experimented on) rats are selected from each strain, and each rat is run through a test maze until it can negotiate the maze with no errors on two consecutive trials. The following results are obtained (number of trials to learn):
  Apply the Mann-Whitney test. Use 
  
 Interpret the outcome using appropriate descriptive statistics.

Quizplus · Accepted Answer

The Answer is

critical values (.05): 11 and 29; retain

; no significant difference between medians.

We Wish to Determine If Two Strains of Laboratory Rats