Data is used to identify trends, patterns and relationships by collecting observations, organizing them, and applying data analytics to reveal changes, repeated features and connections. This is shared SL and HL content within IB Digital Society topic 3.1 Data.
Data consists of raw facts or observations. When data is processed and given context, it becomes information that people can interpret. Analysts may clean inaccurate or duplicated records, classify values, calculate summary statistics, and use visualizations such as line graphs, bar charts and scatter plots.
| Analytical feature | What analysts look for | Example |
|---|---|---|
| Trend | A general direction of change over time | Monthly website visits increase across a year. |
| Pattern | A repeated or recognizable arrangement | Website visits rise every weekend. |
| Relationship | An association between two or more variables | Higher advertising expenditure is associated with more website visits. |
The process normally follows several stages. First, relevant data is collected from sources such as surveys, sensors, transactions or online activity. Next, it is organized and cleaned so that comparisons are meaningful. Analysts then filter or group the data, calculate measures such as averages and percentages, and represent results visually. Finally, they interpret the findings in context and consider whether the dataset is sufficiently reliable, representative and complete.
A common misconception is that a relationship proves that one variable causes another. Correlation does not establish causation. For example, advertising expenditure and website visits may rise together, but a seasonal event could be increasing both. Bias in data collection, missing data and misleading visualizations can also produce unreliable conclusions.
In an IB exam, an explain question requires both the analytical process and reasons it reveals useful information. Connect the answer to impacts and implications for people and communities, and evaluate data quality before accepting a claimed trend or relationship.
