Seeing relationships in dataA scatter plot turns two numerical variables into a picture. Each dot represents one observation, with its horizontal position showing one measurement and its…A practical guide to casino bonuses for new Australian playersOnline casino promotions can look simple at first glance, yet the important details are usually found in the terms. A welcome offer may include free spins,…Creating and interpreting box plotsA box plot turns a set of observations into a compact picture of a distribution. Its central box shows where the middle half of the data lies, the line inside…Normal distribution and the empirical ruleThe normal distribution is a probability model for continuous measurements whose values tend to cluster around a mean and taper into two tails. Its familiar…How to calculate standard deviation step by stepStandard deviation measures how spread out a set of values is around its mean, or average. It answers a question the mean cannot: are the observations…Statistics: mean, median, mode and rangeAustralian students meet numerical data in ordinary places: a Woolworths or Coles receipt, a wait for a Sydney train, a trip on a Melbourne tram, or a…Poker Strategy For Live Play: Read The Table, Not Just The CardsLive poker rewards players who can combine sound mathematics with careful observation. The cards still determine the immediate possibilities, but decisions are…Combinations and permutations: choosing the right methodChoosing three books for a reading group sounds simple, but the counting method changes when order becomes part of the task. A set of three books is a…Independent and dependent events in probabilityProbability questions often ask whether one event affects another. Two shoppers choosing products from the same shelf, for example, may have independent…Understanding probability: definitions and core rulesProbability gives a numerical way to describe how likely an event is. A Bureau of Meteorology forecast might say there is a 40 per cent chance of rain in…