Categorical data - describes information descriptively rather than numerically., Numerical data - represent values that can be measured and put into a logical order., Data - is the study of collecting, organising, presenting, analysing and interpreting data., Discrete data - can be counted., Continuous data - can be measured., Frequency distribution table - has 3 columns. I Score I Tally I Frequency I, Frequency - is the number of times a result or piece of data occurs., Class intervals - are used when data contains too many numerical values., Mean - the average value, Median - the middle score when the data values are ordered, Mode - the most common data value, Range - the difference between the largest and smallest data values, Primary data - data that you have collected yourself, Secondary data - data that has already been collected by someone else, Independent variable - is the one that you change, Dependent variable - is the one that you measure, Controlled variables - are the ones that you keep the same, Outlier - an extreme value in a data set, Cluster - a group of values around a particular value, If the data contains an outlier - the median is the most appropriate measure of centre because outliers do not affect it, If the data does not contain an outlier - the mean or median could be used as the measure of centre. , Probability - the mathematics of chance, Event - a result or outcome that may occur, Outcome - a particular result of an experiment, Favourable outcome - the outcome that we are looking for, Experiment - a process that allows us to collect data by performing trials, Sample space - the list of all possible outcomes of an experiment,

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