Starter quiz
- Select all the examples of quantitative discrete data.
- The distance a bird flies in a day.
- The number of eggs in a nest. ✓
- The colour of a bird's wings.
- The type of tree that a bird's nest is in.
- The number of insects a bird eats in a day. ✓
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- Data that has been previously collected for a different or unknown purpose are called ______ data.
- 'secondary' ✓
- Lucas collects some data on shoe sizes. Which of these statements are correct?
- Shoe sizes are an example of qualitative data
- Shoe sizes are an example of quantitative data ✓
- Shoe sizes are an example of continuous data.
- Shoe sizes are an example of discrete data. ✓
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- Match each type of data to an example.
- qualitative⇔type of pet ✓
- quantitative discrete⇔number of pets in each household ✓
- quantitative continuous⇔mass of each pet ✓
- Laura measures the temperature outside her school every morning at 10 am for a month. What type of data has Laura collected?
- continuous data ✓
- discrete data
- primary data ✓
- quantitative data ✓
- secondary data
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- Aisha writes an article for the school magazine about sport. She uses data from the local sports centre on what exercise classes they offer. What type of data has Aisha used?
- numerical data
- primary data
- qualitative data ✓
- quantitative data
- secondary data ✓
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Exit quiz
- The ______ is the entire set of people, creatures, plants or items that make up the whole group which is being studied.
- 'population' ✓
- A simple ______ sample is where every item in a population has an equal chance of being selected for the sample.
- 'random' ✓
- Investigation: A vet wants to check a sample of sheep from a farm to see if they are all healthy. What is the population in the vet's investigation?
- All the sheep in the local area
- All the sheep on the farm ✓
- All the sheep in one field on the farm
- All the animals on the farm
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- A teacher asks each pupil in a class of 30 to write down any two numbers between 1 and 30. The teacher uses RanInt#(1, 15) on her calculator to pick 5 pupils. Will this give a simple random sample?
- Yes, because each pupil has an equal chance of being chosen.
- Yes, because a random number generator can choose each pupil.
- No, because every pupil has two numbers.
- No, because some pupils are less likely to be chosen. ✓
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These six pupils are assigned a range of numbers. A simple random sample of two pupils will be taken using these numbers. The range of integers that Jun should be assigned is ______.- '126 - 150' ✓
- These six pupils are assigned a range of numbers. A simple random sample of two pupils will be taken using these numbers. What calculation will generate a simple random sample for this population?
- RanInt#(1, 25)
- RanInt#(100, 125)
- RanInt#(1, 126)
- RanInt#(1, 150) ✓
- RanInt#(1, 145)
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Samples are used when using the whole population would be impractical/destructive.
- There are various sampling methods.
- A simple random sample is one of the easiest samples to collect.
Common misconception
Names in a hat is the simplest way to perform a simple random sample.
This can be true for very small populations but becomes time consuming quickly.
Keywords
Simple random sample - A simple random sample is where every item in a population has an equal chance of being selected for the sample.
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