understand the notion of independence of an event A from an event B, as defined by P(A|B)=P(A)
establish and use the formula 𝑃(𝐴∩𝐵) = 𝑃(A)𝑃(𝐵) for independent events 𝐴 and 𝐵, and recognise the symmetry of independence
use relative frequencies obtained from data as point estimates of conditional probabilities and as indications of possible independence of events
