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Data Collection Mastery Worksheet
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Data Collection Mastery Worksheet
Answer every question. For multiple-select questions, choose all suitable options. Explain your reasoning where asked.
Choosing and Planning Data Collection
1.A researcher wants to estimate how many hours Year 11 students sleep on a typical school night. Which method is most suitable for collecting this information?
- Measure students with a tape measure
- Ask students to record their sleep hours in a short survey
- Watch students during a lesson
- Use an online article about sleep in adults
2.A class is gathering height information for a health study. Select every suitable way to obtain the data.
- Measure each participant using a height measure
- Ask participants to report their height
- Request relevant, authorised health-record data
- Estimate each person's height by looking at them
3.Explain how random selection can make a sample more useful when estimating a characteristic of all Year 11 students.
4.A study will investigate whether students who eat breakfast tend to achieve different mathematics test results. Propose suitable data for the study, a collection method, and a sample.
Storing and Preparing Data
5.What is a data dictionary? Give one reason a researcher should create one before analysing a dataset.
6.A survey recorded these ages in years: 15, 16, 15, 17, 16, 15, 18, 16. Create two non-overlapping age categories that cover all the recorded values. Give each category a label and explain one benefit of grouping the ages.
7.A research team needs to store thousands of survey responses so that they can sort and analyse them. Select all appropriate storage tools.
- A spreadsheet
- A database
- A single handwritten list as the only copy
- Relying on team members to remember the responses
Checking Data Quality
Record
Height (cm)
Age (years)
Test score (out of 100)
A
164
16
84
B
171
17
91
C
998
16
77
D
168
246
103
8.In the sample records above, identify every value that is clearly outside the stated measurement limits or plausible range for Year 11 students. State which variable each value belongs to.
9.For each suspicious value in the sample records above, explain why it needs checking and describe a responsible way to correct or handle it.
10.Name three different sources of error that can affect a statistical investigation.
11.Design a simple data dictionary for a survey about students' favourite school subjects. Include at least four variables, and for each give its meaning and an example of how responses could be coded.
3 printable pages
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