## Teaching the Runs Test for Randomness

The other day in my statistics class, I was teaching the runs test for randomness. One of my students keeps on asking for an in-class activity, and it happened that I had an extra half-an-hour of class time to spare. So, I adapted this famous teaching experiment for use in my own class.
The set-up: I split the class into 8 groups, with 3-4 students in each group. Four of the groups were labeled ‘Group A’ and the other four groups were ‘Group B’. Group A went into the hallway while I explained the assignment to Group B.
Group B was the coin tossing group. They were asked to flip a coin 200 times and record the sequence of heads and tails that they observed. Once I made sure that Group B understood the instructions, they went into the hallway while I explained the assignment to Group A.
Group A was the random listing group. They were asked...