Dr. Good wants to find out whether the amygdala plays a role in controlling responses to fearful stimuli. For this purpose, Dr. Good records the behavior of mice in response to a rubber snake (snakes are natural enemies of mice) before and after surgical ablation (i.e., destruction) of the amygdala. She uses the time the mice spent hiding behind a wooden block placed in their cages as an index of the strength of their fear response. The data collected is tabled below. You can proceed as if all of the assumptions for the relevant statistical test to be valid have been met.

Mouse	Time (min) Spent Hiding before Ablation of Amygdala	Time (min) Spent Hiding after Ablation of Amygdala
1	1	2
2	5	3
3	4	1
4	6	5
5	6	1
6	9	2
7	9	5
8	10	8
9	10	4
10	10	4

What is the observed value of the test statistic?

Dr. Good wants to find out whether the amygdala plays a role in controlling responses to fearful stimuli. For this purpose, Dr. Good records the behavior of mice in response to a rubber snake (snakes are natural enemies of mice) before and after surgical ablation (i.e., destruction) of the amygdala. She uses the time the mice spent hiding behind a wooden block placed in their cages as an index of the strength of their fear response. The data collected is tabled below. You can proceed as if all of the assumptions for the relevant statistical test to be valid have been met.

Mouse	Time (min) Spent Hiding before Ablation of Amygdala	Time (min) Spent Hiding after Ablation of Amygdala
1	1	2
2	5	3
3	4	1
4	6	5
5	6	1
6	9	2
7	9	5
8	10	8
9	10	4
10	10	4

What is the observed value of the test statistic?

-10

-2.5

-4.4

-1