BI-349
Observed and expected ratios
Biology · Secondary 3 · Hard · Observed and expected ratios
A student tosses a coin to model a 1 : 1 genetic ratio. Set A is 6 tosses with 5 heads and 1 tail. Set B is 200 tosses with 110 heads and 90 tails. Which statement best explains why Set A is further from the expected 1 : 1 ratio?
- Small sample sizes show larger random deviations from expected ratios.
- Coins are not suitable for modelling genetic ratios at all.
- The probability of heads increases when more tosses are done.
- Set B must have used a biased coin with two heads.
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