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The extra digits after the decimal point don’t add any real meaning. They simply make the
number look more detailed.
This is why it’s important to understand the original data and its precision. Metadata, which is
information about data, often stores details about its precision and accuracy.
Checkpoint Fill in the blanks.
1. is the collection of facts, but without much meaning on its own.
2. The well-organised and a clear format data is .
3. A is a system that stores data in an organised way
4. Text files store data as .
Ask
AGENT
OrangeAI
How can incorrect or unclear data lead to poor decisions?
Study
THINKING LIKE A DATA ANALYST
Imagine you’re tracking your daily study time and you want to see if studying for longer helps you
improve your grades. This is where you can think like a data analyst.
Step 1: Observing carefully: You start by observing how much time you spend studying each
day and the grades you get for your
assignments. Date Hours Studied Grade
Step 2: Organising information: Next, Monday 1 hour 70%
you organise the data by creating Tuesday 2 hours 80%
a table. You write down how many Wednesday 1.5 hours 75%
hours you studied and the grades you Thursday 2.5 hours 85%
got each day or week.
Step 3: Looking for patterns: You start looking for patterns. For example, when you study for
more hours, your grade seems to be higher. You notice that on days when you studied for at
least 2 hours, your grades were better.
Step 4: Asking questions: You then ask, “Why do my grades improve when I study more?” Is it
because you have more time to review the material? Or maybe because you’re less distracted?
Step 5: Drawing conclusions: Based on your observations, you can draw a conclusion: “The
more I study, the better my grades seem to be.” This is a decision you can make and now you
know that studying more helps you improve!
Data Visualisation and Analysis 61
