Analysing data

In this lesson

1. 0:00 Analysing data with statistical methods
2. 1:04 Understanding averages: median, mean, and mode
3. 3:14 Calculating median for customer feedback data
4. 4:16 Working with grouped and ungrouped datasets
5. 7:35 Calculating mean for grouped data with ranges
6. 12:06 Measuring data spread: standard deviation
7. 14:16 Standard deviation formula for ungrouped data
8. 16:02 Calculating standard deviation step by step
9. 20:40 Standard deviation for grouped tourist data
10. 25:29 Coefficient of variation for comparing datasets
11. 28:12 Expected values and probability outcomes

About this lesson

More importantly, you'll master how to measure the spread of your data using standard deviation and variance, which tell you how reliable your average actually is as a representation of your entire data set. The video walks you through practical calculations for both ungrouped and grouped data sets, showing you how to work with raw individual values as well as data organised into ranges with frequencies. You'll learn the formulas provided in your exam papers and see worked examples using real scenarios—from customer feedback ratings to tourist travel distances. This builds your confidence in applying these techniques under exam conditions. You'll also explore two additional tools: the coefficient of variation, which lets you compare the spread between different data sets even when their means are very different, and expected values, a weighted average technique useful for predicting outcomes when you can assign probabilities. Understanding when and how to use each of these methods will strengthen your ability to interpret numerical data and support your decision-making in management accounting scenarios.

Duration: 33m