Starter quiz
- When you count how many individuals (people, animals etc.) are in each category of a data set you are finding the ______ for each category.
- 'frequency' ✓
- Put the stages of a data investigation in order.
- 1⇔asking a question to explore
- 2⇔collecting data
- 3⇔organising the data
- 4⇔analysing the data
- 5⇔interpreting the data
- 6⇔choosing outcomes or actions based on the results
- Which of these data sets can only contain integer values?
- distances travelled on a train (miles)
- number of people travelling on a train ✓
- time spent on a train (minutes)
- weights of trains (tons)
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- Which tool measures length?
- measuring tape ✓
- stop watch
- weighing scales
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What is the frequency of 'moon' in the list? ______- '4' ✓
- Which is an example of a tally chart?
Exit quiz
- Which tool could be used to collect data about how satisfied customers are after using their business?
- measuring tape
- questionnaire ✓
- timer
- weighing scales
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- Which tool could you use to collect data about the frequencies of different species of birds that land in a garden?
- interview
- questionnaire
- tally chart ✓
- timer
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- Which word describes the entire set of people, creatures, plants or items that make up the whole group that is being studied in a data investigation?
- bias
- method
- population ✓
- sample
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- A ______ is a subset of the population of a data investigation.
- 'sample' ✓
- Alex wants to investigate how much time 16 year-old pupils in the UK spend doing homework per week. What is the population in Alex's investigation?
- all school pupils in the UK
- all 16 year-old school pupils in the UK ✓
- all pupils in Alex's school
- all 16 year-old pupils in Alex's school
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- Laura wants to investigate how much time pupils in her school spend watching cartoons per week. Which of these samples would be the most representative of the population in Laura's investigation?
- 20 people in the oldest year group
- 20 people in the middle year group
- 10 people from the oldest year group and 10 people from the youngest year group
- 4 people from each of the 5 year groups in the school ✓
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Worksheet
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Video
Lesson Details
Key learning points
- Different statistical problems need investigating in different ways.
- Effective data collection avoids bias where appropriate.
- When sampling from a population, the sample size needs to be practical.
Common misconception
The word 'population' always refers to the entire population of a country or the world.
The population in a given context is defined by the entire set of people/creatures/items that are being considered.
Keywords
Population - The population is the entire set of people, creatures, plants or items that make up the whole group which is being studied.
Bias - Bias can be present in any sample collected from a population and may affect the results of a statistical investigation
Sample - A sample is a subset of the population
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