4.05 Coin Flip Simulation Tutorial

4.5 Coin Flip Simulation Tutorial Curriculum Page

Coin Flip Simulation Tutorial: https://docs.google.com/document/d/1EYRsebRNbg5jmAZAVsq9n7lGdfanQnNOKFgmn_Zd8eQ/edit?usp=sharing

1. Write an if/else statement to express the following real life situation. Mary likes ice cream and always chooses chocolate unless there is no chocolate in which case she chooses strawberry. But if there’s no strawberry either then she settles for vanilla, which, for some reason, is always available.

if chocolate = true

then Mary chooses chocolate

elseif starwberry = true

then Mary chooses strawberry

else Mary chooses vanilla

2. We didn’t need it for the loop in this lesson, but the number element in the For each number loop is a local variable whose value changes automatically on each iteration of the loop. For example, in this loop number would start at 1 and then go to 2, 3 and 4. And this value can be used in the body of the loop, as shown in this example. Given that, trace through this loop and figure out what value global sum would have when the loop finishes.

Global sum would have a value of 10.

3. App Inventor’s random-integer block is an abstract model of randomness -- i.e., an abstraction of real randomness such as flipping a real coin. What would you say about the random-integer block if you ran the coin flipping simulation 10,000 times and the result was that it came up heads 55% of the time?

I would say that the random integer block still functions pretty well because a 5% error isn't that much for such a large amount of trials.