Working with Data

What This Topic Covers

Working with Data introduces the core tools of descriptive statistics. At Standard level in MYP Year 5, students are expected to calculate and interpret measures of central tendency and spread, and to read a range of statistical diagrams accurately.

Key Concepts

Measures of Central Tendency

You need to be confident calculating the mean, median, and mode from raw data, frequency tables, and grouped data. Know when each measure is most appropriate — for example, the median is preferred when data contains extreme values.

Spread

The range gives a simple measure of spread. In this topic, you will use range to compare datasets and begin to see its limitations when outliers are present.

Reading Data Displays

You will interpret and draw:

• Bar charts and histograms (equally spaced classes)
• Box plots (box-and-whisker diagrams)
• Frequency tables

Box plots are particularly common in MYP assessments. Make sure you can read the five-number summary: minimum, Q1, median, Q3, and maximum.

Common Mistakes

• Confusing the median position with its value — always order data first
• Reading bar chart frequency from the wrong axis
• Forgetting to include units or context in written answers

MYP Question Style

Questions often present data in context — for example, comparing test scores or rainfall over months. Criterion D tasks will ask you to interpret what a statistic means in the real-world scenario, not just calculate it. Always answer in context.

Practice Approach

Start with frequency table calculations, then practise reading and sketching box plots. Once confident, attempt questions that mix both — these are typical of end-of-unit assessments.