Expected Frequency (Leaving Cert Mathematics): Flashcards

Predicts how often an event should occur based on theoretical probability

$\text{Probability} \times \text{Total trials}$

Determine the probability of the event

Identify the total number of trials

Multiply probability by total trials

Hypothesis testing and chi-squared test

$0.5$

$0.5 \times 100 = 50$

$\frac{1}{6}$

$\frac{1}{6} \times 120 = 20$

$0.3 \times 500 = 150$