UNIT OVERVIEW

Statistics helps you make sense of data. When you calculate your average mark or compare test scores, you are already using statistics. This unit builds on those skills.

By the end of this unit, you will be able to:

• Calculate measures of central tendency (mean, median, mode) for ungrouped and grouped data
• Determine the range, quartiles, percentiles, and interquartile range
• Construct and interpret five-number summaries
• Draw and analyse box-and-whisker diagrams
• Use statistical tools to compare datasets and draw conclusions
• Identify the modal class and the interval containing the median in grouped data

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