Data
This is a mindmap for Unit 1 foundation maths...the topic is data
- Created by: Tania
- Created on: 29-05-13 11:14
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- Data
- Quantitative
- Time Taken
- Mass
- Heights
- It has to be a number
- Easier to analyse
- Qualitative
- Colour
- It has to be words
- Gender
- Describe it
- Harder to analyse
- How nice/ bad something is
- Discrete
- Exactly
- Countable
- Individual values
- Number of people, points, pages
- Continuous
- Age
- Always
- More accurate
- Length
- Any value
- Sampling
- Cheaper
- Cons- No info every member of population
- Pros- Quicker Cheaper more practical than using the whole population
- Survey- part of the population
- Make estimates draw conclusions about whole population
- Has to be representative- unbiased big enough
- Survey Questions
- Fixed number of answers
- Limited options
- Easily processed
- Questionnaires
- "Other" Category
- Clear brief
- Relevent
- Easy to understand
- All possible anwsers
- Biased
- Secondary
- Databases
- Newspapers
- Processed
- Historical records
- Internet
- Someone else's
- Can be presented as graph percentage table
- Primary
- You've collected
- Experiment
- Measure
- Raw data (Data that hasn't been processed)
- Questionnaire
- Survey
- Splitting data into Classes
- Grouping it
- Lots of data only
- Different classes
- Define the classes well
- Quantitative
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