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):

(a) Set up

and

.
(b) Perform the test (α = .05)
(c) Draw final conclusions.

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):
  
(a)  Set up 
  
 and 
 
  .  
(b) Perform the test (α = .05) 
(c)  Draw final conclusions.

Quizplus · Accepted Answer

The Answer is (a)
(a) (b) (c) retain ; sample difference is not sufficient to warrant that the two strains differ.

(b)

(c) retain (a) (b) (c) retain ; sample difference is not sufficient to warrant that the two strains differ.

; sample difference is not sufficient to warrant that the two strains differ.

We Wish to Determine If Two Strains of Laboratory Rats