Cambridge O Level Statistics

Data and its collection

Covers General ideas of sampling, Types of sampling, Bias: how it arises and is avoided, General ideas of surveys, Types of data and variable

Summary representation of data

Covers Classification and representation in tabular form, Representation in pictorial or diagrammatic form, The purpose and use of various forms of representation, their advantages and disadvantages, Interpretation of data presented in tabular, pictorial or diagrammatic form

Formation of data into ungrouped or grouped frequency distributions

Covers Class measures for grouped frequency distributions, Representation in frequency polygons and histograms

Formation of frequency distributions into cumulative frequency distributions

Covers Representation in tabular form, Representation in graphical form

Statistical measures, their interpretation and appropriate use

Covers Measures of central tendency: mean, median, mode and modal class, Measures of dispersion: range, interquartile range, variance and standard deviation, Quartiles and percentiles, Measures for combined sets of data

Transformations involving mean and standard deviation

Covers Effect on mean and standard deviation of adding a constant to each observation and of multiplying each observation by a constant, Linear transformation of data to a given mean and standard deviation

Crude and standardised rates, and their appropriate use

Index numbers

Bivariate distributions and their representation by scatter diagrams

Covers Elementary ideas of correlation, Lines of best fit

Time series

Covers Understanding of trend, Understanding of seasonal variation

Elementary ideas of probability

Probability distributions

Covers Formation of the probability distribution of a discrete variable, Expectation