Investigate techniques for collecting data, including census, sampling and observation (ACMSP284)
LO:To investigate techniques for collecting data.
Know:
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What a census is
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What sampling is
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What observation is
Understand:
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That there are different ways of collecting data, each with their positives and negatives.
Do:
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I can use different survey techniques to collect data.
Visual Representations
Notes
There are 2 general techniques for collecting data, Census and Sampling.
Census – a census is when you collect data for every member of the group.
Sampling (sample) – a sample is when you collect data for a selected members of the group.
Positives and Negatives
| Positives | Negatives | |
| Census | + More accurate because you have to survey everyone | – Takes a lot of time to survey everyone |
| Sampling | + Much quicker to survey a select few rather than the whole population | – Less accurate as the sample might not be representative of the whole. |
Sampling (sample) – a sample is when you collect data for a selected members of the group.
Collecting Data Videos
Practise Questions
Year 8 Big Ideas
Exercise 9A pg. 313 Now Try These: Q. 1-3
My Maths 8
Exercise 9A pg. 459 Q. 1-15