When writing your IA with probability, the main question you are asking yourself is "are these two events dependent on each other?". You will analysis this through creating Two Way Tables, Venn diagrams, and Tree diagrams, looking at different formulas, and testing for independence.
If you are writing your IA with probably you will most likely follow this flow.
Raw Data
Two Way Table
Tree diagram
Basic Probabilities
Conditional probabilities
Check for Independence
Conclusion
The following videos are to help guide you in case you forgot how to do these calculations.
Watch these videos to remind yourself how to create a two way table, venn diagram, and tree diagram.
Remember, once you have your diagram you should insert it into your Data Analysis Template and answer the guided questions.
Let's do some math! Here are 3 videos that show you math calculations you can do with each diagram. Remember to define your variables, type out your steps, and input each calculation into your Data Analysis Template.
Every calculation should be shown and analyzed. As in, you should explain your answer.
What does it mean?
What does it tell you?
What does it make you wonder?
Should you look at more info or do another calculation to understand it?
Does it support your aim?
Depending on your question, you will most likely need to show if your events are conditional or not.
Depending on the diagram you have, you will use different processes to show this.
The goal is to prove whether your events are influencing one another or if they are independent.