Mathematics
GeometryNumbersAlgebraFunctionsStatistics and probability
Statistics and probability
Statistic frequency
Learn how to organise statistical data lists in frequency tables.
Bar chart
Learn how to represent statistical data with pie charts.
Remember that these charts are used when we wish to highlight absolute frequencies.
Pie chart
Learn how to represent statistical data with bar charts.
Remember that these charts are used when we wish to highlight relative frequencies.
Mean
Learn how to calculate the statistical mean after a frequency table.
Mode and median
Learn how to calculate the mode and the statistical median after a frequency table.
Laplace Rule
Learn how to calculate simple probabilities by using Laplace rule.
Histogram
Learn how to represent statistical data with histograms.
In this activity, we use continuous data, classified in intervals, and represented by a class mark.
Frequencies polygon
Learn how to represent statistical data with frequencies polygons.
Remember these charts soften the differences created when choosing one or another interval of classification.
In this activity, we use continuous data, classified in intervals, and represented by a class mark.
Variance and typical deviation
Learn how to calculate the typical deviation after a frequency table.
Quartiles
Experiment with quartiles in a statistical data set.
Remember that quartiles are data from the set, and in this activity they cannot be decimals, so they move in steps.
You can change the data by dragging the blue points in the graph.
Linear correlation
Experiment with pairs of statistical data, and their linear correlation.
Remember that the linear statistical correlation is measured with Pearson's coefficient.
Remember that the value +1 indicates a perfect direct linear relation, -1 a perfect inverse linear relation, and 0 no linear relation (but there can be another type of relation).
You can change the data by dragging the blue points in the graph.
Measures of central tendency after the table
Practice how to summarise a statistical data set, given as a frequency table.
Calculate the mean, median and mode of a group of students' weekly pocket money.
Measures of position
Practice calculating different measures of position (quartiles) of a set of statistical data, given as a table.
Measures of dispersion
Practice calculating different measures of dispersion (variance) of a small set of statistical data, given as a list.
Simple random events
Learn how to calculate simple probabilities after this simple situation.
Compound random events
Learn how to calculate compound probabilities after this simple situation.
Combinatorics
Practice with simple combinatoric problems (variations with or without repetition, permutations and combinations).
Solve the answers posed step by step about the different formulations.
Remember that permutations are variations without repetition of every element. And in combinations, order is not important.
Probability of compound events
Practice calculating compound probabilities.
The problem suggests taking consecutively two balls from a bag containing two colours.