GCSE Maths Practice: relative-frequency

Question 7 of 11

Use relative frequency to determine if a spinner may be biased.

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\( \begin{array}{l}\text{A spinner with 4 equal sections is spun 100 times} \\ \text{and lands on red 70 times. What can you conclude} \\ \text{from this result?}\end{array} \)

Choose one option:

It might be biased because red occurred more often than expected. It must be fair since red appeared often. You cannot tell anything without repeating the experiment.

Significant deviation from expected probability may indicate bias.

Compare observed frequency with expected probability for fairness.