# Numeracy & Quantitative Methods: Numeracy for Professional Purposes Laura Lake.

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Numeracy & Quantitative Methods: Numeracy for Professional Purposes Laura Lake

Pies charts Bar charts Histograms Other types of charts: box plots stem and leaf Recap

A box and whisker plot is a way of summarising a set of data measured on an interval scale. It is the graphical representation of the range. A box plot shows the most extreme values in the data set (maximum and minimum values), the lower and upper quartiles, and the median. Shows shape of the distribution, central value, and variability. Box and whisker plots

Box plots Chart 1: Age of respondents, years q118.5 min4 median24 max47 q336.5 Minimum Maximum Q3 Q1 Median

Stem and leaf plot summarises scale data. Helps to show the major features of the data’s distribution. Stem and leaf plot is similar to a histogram sets. Shows a table and a picture of the data. Usually works better with smaller data sets. Stem and leaf plot

Exam scores out of 100 N = 25 46, 7, 8 52, 4, 5, 5, 6, 6, 7, 7, 8, 9 62, 2, 5, 5, 7, 8, 8 72, 2, 4, 7 82

Bryman, A. (2008) Social Research Methods. 3rd Ed. Oxford: Oxford University Press. David, M. and Sutton, C. (2011) Social Research : An Introduction. 2nd ed. London: Sage. References