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🔬 Statistical Investigation Guide
Level 4: Plan and conduct investigations using the statistical enquiry cycle
📊 The Statistical Enquiry Cycle
1
Problem
What question do you want to answer?
2
Plan
How will you collect your data?
3
Data
Collect and organize your information
4
Analysis
What patterns do you see?
📋 Data Collection Methods
🎯 Surveys & Questionnaires
Ask people questions to gather opinions and preferences
👀 Observations
Watch and record what happens naturally
📊 Existing Data
Use information that's already been collected
🔍 Example: School Lunch Investigation
1. What was the investigation question?
2. How was this data collected?
3. What conclusion can you draw?
✏️ Plan Your Own Investigation
Step 1: Choose Your Question
What do you want to find out about your school?
Step 2: Plan Your Data Collection
How will you gather your information?
Step 3: Design Your Data Table
| Category | Count |
| _____________ | _____ |
| _____________ | _____ |
| _____________ | _____ |
📖 Key Statistical Terms
Mode: Most common value
Range: Difference between highest and lowest
Total: Sum of all values
Category: Group of similar items