15. A group of 10 college sophomores was trained on a computer video game. The reward consisted of points needed to fulfill an experimental participation re
quirement. A special reward schedule (fixed interval, FI) was used during the
game. According to the schedule
, the participant received reinforcement for
points scored after a set period of time. The number of total points earned by
each student during a 20-minute period is shown here. Compute R, s^2, and s.
Student No. Points Earned
1
2
3
4
5
6
7
8
9
10
55
74
83
43
25
38
44
49
54
137