In this activity, students will roll two dice and record the sum. They then need to make a frequency table, histogram and find the probability of each sum. They are asked question throughout the activity to lead them. The second part is to then find the probability as a class for each of the sums. At the end, they need to figure out the theoretical probability and compare to their probability.
I have used this activity with small and large groups. I like to tie in to the fact that the more data we have, the closer the experimental probability comes to the theoretical probability.