Discuss the below:
Q: Six groups of randomly selected students matched for IQ and age were formed. Each student was taught a concept of time by using one of three methods: Lecture, demonstration, or teaching machine. The scores are shown in the table below indicated the student's performance when they were tested on how well the grasped the concept.
Group Lecture Demonstration Teaching Machine
1 20 23 24
2 25 25 27
3 30 40 39
4 37 26 41
5 24 20 21
6 16 18 25
Is there sufficient evidence to indicate that the teaching methods differ in effectiveness?