📊 Part 1: Data Collection Methods and Errors

1. List three different methods you could use to collect data for a school investigation:

2. Circle the best data collection method for each investigation:

a) Finding out students' favourite lunch foods:

Survey/questionnaire

Measuring with rulers

Observation only

b) Recording the height of Year 8 students:

Asking students to guess

Measuring with tape measure

Looking at school records

3. Tick all the types of errors that can happen during data collection:

Writing down the wrong number

Using broken measuring equipment

Asking confusing questions

Only asking your friends instead of different people

Forgetting to record some data

4. Explain why accurate data collection is important for getting trustworthy results:

📝 Part 2: Creating an Informal Data Dictionary

5. Complete this informal data dictionary for a survey about students' travel to school:

Variable Name	Description	Units/Notes
Student Name	_________________	First name only for privacy
Travel Method	How student gets to school	_________________
_________________	Time taken to travel to school	Minutes, rounded to nearest 5

6. Why is it helpful to create a data dictionary before collecting data?

🔍 Part 3: Finding and Correcting Errors

7. Look at this data about students' favourite colours. Find and circle 3 errors, then suggest corrections:

Data collected:

Sarah - Blue, Tom - Grene, Lisa - Red, Mike - 7, Emma - Purple, Josh - Yellow, Kate - Ornage

Corrections needed:

Error 1: _____________ should be _____________

Error 2: _____________ should be _____________

Error 3: _____________ should be _____________

8. A student measured classmates' heights and got these results in centimetres: 165, 162, 170, 45, 168, 159. What might be wrong with one measurement and how could you check?

9. Describe one ethical consideration (rule about treating people fairly) when collecting data from other students: