posted by caitlin .
You are going to toss 2 pennies 20 times. Make a prediction. how many times do you think the 2 pennies will come up as:
1 head, 1 tail:
You can pick any number: it is a prediction. In 20 times, the distribution will be binomial, and it will vaguely look like a normal distribution, if one did it 2000 times, it would look much more normal.