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SingaporeMaths

Statistics and Probability

4 dot points across 4 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do we summarise data with an average and describe how spread out it is?

Calculate the mean, median and mode, including from frequency tables, and find the range as a measure of spread
A focused answer to the O-Level E-Maths outcome on averages and spread. The mean, median and mode, calculating them from a list and from a frequency table, the range, and choosing a suitable average.
8 min answer →

How do we use a cumulative frequency curve to find the median, quartiles and spread?

Construct a cumulative frequency curve and use it to estimate the median, quartiles, interquartile range and percentiles
A focused answer to the O-Level E-Maths outcome on cumulative frequency. Building the cumulative frequency curve, reading the median and quartiles, the interquartile range, and estimating percentiles.
9 min answer →

How do we organise and display data, and read information from statistical diagrams?

Construct and interpret bar charts, pie charts, line graphs, histograms and stem-and-leaf diagrams, and choose an appropriate display
A focused answer to the O-Level E-Maths outcome on displaying data. Bar charts, pie charts, line graphs, histograms and stem-and-leaf diagrams, reading values off each, and choosing a suitable display.
8 min answer →

How do we calculate the probability of single events and of combined events?

Calculate the probability of single events, and of combined events using the addition and multiplication rules with tree diagrams
A focused answer to the O-Level E-Maths outcome on probability. The probability of a single event, mutually exclusive and independent events, the addition and multiplication rules, and tree diagrams.
9 min answer →