📊 Part 1: Data Collection Methods

1. Which of these is the BEST method to collect data about students' favourite subjects at your school?

Ask only your friends

Use random sampling of all students

Ask only Year 13 students

Survey students outside the maths classroom

2. You want to investigate "How much time do Year 11 students spend on homework each week?" What type of variable is "hours spent on homework"?

Categorical

Numerical continuous

Numerical discrete

Ordinal

3. Which ethical considerations are important when collecting data? (Select all that apply)

Getting informed consent from participants

Keeping data confidential and secure

Sharing individual responses publicly

Respecting cultural values about data as taonga

4. A data dictionary helps us to:

Find spelling mistakes in our data

Describe what each variable means and how it's measured

Calculate the mean of our data

Create graphs automatically

🔍 Part 2: Data Management and Analysis

5. Look at this data about students' ages: 16, 17, 15, 16, 61, 17, 16, 15. What error can you identify and how would you fix it?

Error identified: _________________________________

How to fix it: _________________________________

6. You have collected data on students' travel time to school in minutes: 5, 8, 12, 15, 18, 22, 25, 28, 35, 45, 60. You want to group this data into categories. Complete the data dictionary below:

Variable Name: ________________________

Variable Type: ________________________

Categories/Groups:

Units: ________________________

7. What type of graph would be most appropriate to display the travel time data from Question 6?

Pie chart

Histogram

Scatter plot

Line graph

💭 Part 3: Critical Thinking and Communication

8. A newspaper headline claims: "Students who eat breakfast score 20% higher on tests!" What questions should you ask about this claim before accepting it?

9. You are investigating whether there's a relationship between hours of sleep and academic performance. Describe one way you could collect this data ethically and one potential source of bias in your method.

Ethical collection method:

Potential source of bias:

10. Explain why it's important to treat data as taonga (treasure) when working with information about people and communities in New Zealand.