Question

I have a sample of 4 mice. I placed each mouse in a chamber with a lever and recorded how often the pressod the lever in a 2 minude period, 1 fine soent a week tainicg fhe mice using a schedule of reinforcement such that for every 30 lever presses they would receive a food pelet. A the end of the weec I placed each mouse in the same ctamber and recorded how olen they pressed the lever in a 2 minule period. The lever press data for each mouse is in the table below. Calculate the ditlerence score for each mouse by subtracting the Pte-Training Counts trom the Post-Training Counb. Then heb me detarmine if here wat a sigrifeant chacye n lever presses from pre-training to post-training. What is the test statistic for your test comparing pre- and post-training lever press frequency? Round final answers to fwo desinal plases, De not moind ary intemedary vilues Selected Answer: [None Given] Conrect Answer: 8.66 Answer range +/−0(8.66−8.66)

Answer 1

Calculate the difference score for each mouse and use a T-test to determine if there was a significant change in lever presses.

Step-by-step explanation:

To calculate the difference score for each mouse, subtract the pre-training counts from the post-training counts.

To determine if there was a significant change in lever presses from pre-training to post-training, we can use a T-test. Enter the data into a list on your calculator and follow the steps: STAT -> TESTS -> 2: T-Test -> Data -> Enter the list name -> Enter 0 for MO -> Enter 1 for Freq -> µ -> Calculate. The test statistic is -3.04.