Data Collection Mastery Worksheet

Name:

Date:

📊 Part 1: Data Collection Methods

1. Which data collection method would be BEST for finding out how many hours Year 11 students sleep each night?

Measuring with a ruler

Survey forms

Observing students in class

Using secondary data from the internet

2. Select ALL methods you could use to collect data about student heights:

Measuring with a tape measure

Survey asking students their height

School health records (secondary data)

Guessing by observation

3. Explain why random sampling is important when collecting data:

4. You want to investigate: "Do students who eat breakfast perform better in maths tests?" Plan your data collection by filling in the gaps:

What data will you collect? _________________________________

How will you collect it? ____________________________________

Who will be in your sample? ______________________________

📝 Part 2: Data Storage and Processing

5. What is a data dictionary and why is it important?

6. Look at this raw age data: 16, 17, 16, 18, 17, 16, 19, 17 Create new age categories that would be useful for analysis:

Category 1: Ages _____ to _____ (Label: _______________)

Category 2: Ages _____ to _____ (Label: _______________)

Why might these categories be helpful? _________________________

7. Circle the data storage methods that would be appropriate for a large dataset:

Writing on paper

Spreadsheet (Excel/Google Sheets)

Database

Remembering in your head

🔍 Part 3: Finding and Fixing Data Errors

8. Look at this student data. Circle any errors you can find:

Student Heights (cm): 165, 172, 168, 999, 170, 163, 175, -5, 169

Student Ages: 16, 17, 16, 18, 250, 17, 16, 17

Test Scores (out of 100): 85, 92, 78, 150, 88, 95, 76, 89

9. For each error you found above, explain WHY it's an error and HOW you would fix it:

10. List THREE common sources of errors in data collection:

1. _________________________________________________________________

2. _________________________________________________________________

3. _________________________________________________________________

Extension Task (Advanced Students): Design a simple data dictionary for collecting information about students' favourite school subjects. Include at least 4 variables and explain how you would code the data.

Data Collection Mastery Worksheet

Data Collection Mastery Worksheet

📊 Part 1: Data Collection Methods

📝 Part 2: Data Storage and Processing

🔍 Part 3: Finding and Fixing Data Errors

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