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Session 3 Family Guide

Data Science for Young Minds — Tips for families facilitating Session 3: Experimental vs. Theoretical Probability

Overview

Why does flipping a coin 10 times not always give 5 heads? Learn the difference between what should happen and what does happen.

Facilitating Each Lesson

Lesson 1: What Should Happen: Theoretical Probability

Tip: Calculate what should happen based on math alone — before running any experiment. Take time to let your child explore and share their thoughts.
Try asking: "What do you think about theoretical probability: calculated from math, not experiments?"

Lesson 2: What Actually Happens: Experimental Probability

Tip: Run experiments and see how results compare to theoretical predictions. Take time to let your child explore and share their thoughts.
Try asking: "What do you think about experimental probability: calculated from actual experiment results?"

Lesson 3: The Law of Large Numbers

Tip: The more you repeat an experiment, the closer results get to the theoretical prediction. This is one of the most powerful ideas in probability. Take time to let your child explore and share their thoughts.
Try asking: "What do you think about what the law of large numbers says: more trials = closer to theory?"

Lesson 4: Why Small Samples Fool Us

Tip: Small groups of data can show dramatic patterns that disappear with more data. Learn why this matters for real-world decisions. Take time to let your child explore and share their thoughts.
Try asking: "What do you think about small sample illusions: patterns that are not real?"

Conversation Starters