Learning objective

By the end of this top, you should be able to

• Understand and be able to calculate measures of central tendency: mean, media, mode

• Understand and be able to calculate measures of spread: standard deviation, range, interquartile range

• Appreciate the effect of data outliers on the various descriptive statistics

• Describe the shape of a distribution of data

• Understand the difference between the formulae for variance of a population and variance of a sample

• Check the values calculated by software against a graph of the data to ensure accuracy

• Understand and calculate standard scores