An experiment is designed to test the "bystander effect" - the tendency of a person to respond to an emergency more slowly if other people are present. Thirty students from a social psychology class are equally and randomly assigned to one of two treatment conditions. In condition A, a student is asked to fill out a questionnaire in a small room by him- or herself. After 5 minutes, artificial smoke is piped under the door of the room, and the student is timed to see how long it takes him or her to respond to the "emergency." In condition B, a student is asked to fill out a questionnaire in a room in which three other students (confederates of the experimenter) are seated. Again, artificial smoke is piped under the door and the participant's reaction time is recorded. Did the experimental condition affect the amount of time it took to respond to the "emergency"?

Condition A	Condition B
146	133	127	151	226	180
148	240	173	213	148	219
121	165	187	133	208	171
107	184	170	216	173	209
122	132	158	208	131	207

Step 1: ( point)

Step 2: ( point)

Step 3: ( point)

Step 4: ( point)

Step 5: (4 points, includes hand calculation and SPSS output)

Calculate t_comp by hand, and show your work. Also, calculate t_comp using SPSS, and copy and paste the resulting output below. Highlight or circle t_comp and the p-value on the SPSS output table.

t_comp =

Step 6: Circle your decision below: ( point)

1. Reject H₀
2. Fail to reject H_o

Step 7: Circle your conclusion below: (1 point)

1. Whether or not there were people in the room did not affect how long it took the participant to respond to the "emergency"
2. Having people in the room significantly increased how long it took the participant to respond to the "emergency"
3. Having people in the room significantly decreased how long it took the participant to respond to the "emergency"