- Year 10•
- Higher
Capture/recapture sampling method
I can use the capture/recapture sampling method to estimate population size.
- Year 10•
- Higher
Capture/recapture sampling method
I can use the capture/recapture sampling method to estimate population size.
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Lesson details
Key learning points
- There are situations in which you may not know the size of a population.
- The capture/recapture sampling method allows you to estimate population size.
- The size of the initial sample affects how accurate your estimation will be.
Keywords
Capture/recapture - Capture-recapture is a sampling method which allows us to estimate the size of a population without counting it fully. It is very useful when the entire population may be too difficult to count.
Common misconception
Pupils may struggle to rearrange the equivalent fractions.
A ratio table may be easier for pupils to use instead.
To help you plan your year 10 maths lesson on: Capture/recapture sampling method, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 maths lesson on: Capture/recapture sampling method, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Prior knowledge starter quiz
6 Questions
Q1.A PE teacher wants to split the students at her school based on the strata of the sport the student enjoys the most. Select the appropriate strata.
Q2.A may be split into groups or strata. A stratified sample is where a representative sample is taken from each stratum.
Q3.Select the sample that is most representative of the population from the given strata: A hospital with 1800 patients and 200 staff.
A sample of 200 people is taken.
Q4.A company employs 250 band A workers, 350 band B workers and 200 Band C workers. A manager wants to take a stratified sample of 160 workers. How many workers from each band should be sampled?
Q5.A bus company wants to take a sample of 1000 customers, stratified by age. The table shows the number of customers in each age group. The bus company should choose under-16s for the sample.
Q6.A bus company wants to take a sample of 500 customers, stratified by age. The table shows the number of customers in each age group. The bus company should choose 16-65 year olds for the sample.
Assessment exit quiz
6 Questions
Q1.__________ is a sampling method which allows you to estimate the size of a population without counting it fully.
Q2.Izzy captures 10 hedgehogs and marks each one with a paper band around its leg. Izzy then recaptures 10 hedgehogs, but finds that none of them have a paper band. Select the possible reasons for this.
Q3.To estimate the population of birds in a wood, 5 birds are captured from a single tree and marked. 9 months later, in a recapture of 10 birds, 0 were marked. Which factors may effect the results?
Q4.As part of a capture-recapture sample, 100 fish from a lake are captured and marked with a white dye. During a recapture of 50 fish, 5 were marked with the white dye. Select the correct statement.
Q5.Andeep captures 15 deer and marks them by attaching a tag to their legs. Three days later, Andeep recaptures 30 deer, and 3 of them have a tag attached. Estimate the total number of deer.
Q6.Jun captures 45 squirrels and marks them by attaching a tag to their legs. Three days later, Jun recaptures 70 squirrels, and 15 of them have a tag attached. Estimate the total number of squirrels.