Statistical skills

3.4.4 Statistical skills

Statistical skills to:

• use appropriate measures of central tendency, spread and cumulative frequency (median, mean, range, quartiles and inter-quartile range, mode and modal class)
• calculate percentage increase or decrease and understand the use of percentiles
• describe relationships in bivariate data: sketch trend lines through scatter plots, draw estimated lines of best fit, make predictions, interpolate and extrapolate trends
• be able to identify weaknesses in selective statistical presentation of data.