7th Grade · Statistics & Probability
Experimental Probability
7.SP.C.6
Definition
The ratio of the number of times an event occurs to the total number of trials conducted. Based on actual observed results.
Examples
- 13 heads out of 20 flips: experimental P(Heads) = 13/20 = 0.65.
- Theoretical P(Heads) = 0.50 — the experiment gave 65%, not exactly 50% but close.
Key rule
More trials bring experimental probability closer to theoretical.
Memory hook
What actually happened, out of how many tries.