by The Open University
Available in 48 free installments
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Studying this unit will help you work towards the following learning outcomes:
Know and be able to use standard symbols and notation: for the pth value in a data set when the values are written in order, the sample lower and upper quartiles and the sample median, the sample mean and the standard deviation.
Be aware that data can have a pattern which may be represented graphically.
Be aware that the standard deviation and the interquartile range are measures of the dispersion in a data set.
Be aware that the median and the interquartile range are more resistant measures than are the mean and the standard deviation.
Acquire the skill of gaining an overall 'feel' for data and the way they are distributed by constructing appropriate graphical displays.
Acquire the skill of describing data sets on the basis of graphical displays and numerical summaries.
Acquire the skill of calculating summary measures such as the median, the upper and lower quartiles, the mean, the standard deviation and the variance, using a calculator.
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