Census Sampling and Observation

Investigate techniques for collecting data, including census, sampling and observation (ACMSP284)

LO:To investigate techniques for collecting data.

Know:

  • What a census is

  • What sampling is

  • What observation is

Understand:

  • That there are different ways of collecting data, each with their positives and negatives.

Do:

  • 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

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