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Chapter 7 - Analysing the Data Part IV - Analysis of Variance Chapter 1 - Behavioural Science and research Chapter 2 - Research Design Chapter 3 - Collecting the Data Chapter 4 - Analysing the Data Part I - Descriptive Statistics Chapter 5 - Analysing the Data Part II - Inferential Statistics Chapter 6 - Analysing the Data Part III - Common Statistical Tests Frequency distributions Central tendancy Variability The normal distribution Transformations Standard scores - Z scores Correlation and regression Linear regression Readings and links


Chapter 4: Analysing the Data
Part II : Descriptive Statistics


Central Tendency

In the last section we explored various ways of describing a data distribution. Our focus then was on determining the frequency of each score in the data set, deriving percentages, and visualising and describing the shape of the distribution. While these are all important in the description process, numerical descriptions of central tendency and variability are much more important. The former gives a single description of the average or "typical" score in the distribution and the latter quantifies how "spread out" the scores are in the distribution.




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