# Statistics notes

Flashcards by Candlepiecheese , updated more than 1 year ago
 Created by Candlepiecheese over 7 years ago
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### Description

Higher Maths Flashcards on Statistics notes, created by Candlepiecheese on 11/23/2013.

## Resource summary

 Question Answer What is statistics? Collecting, analysing, interpreting and presenting data What is a variable? Characteristic being recorded Define data Unordered list Define information When data becomes ordered Nominal Can't be ordered at all, eg; hair color Ordinal Can be arranged in some way, eg; exam grade Discrete Can only have certain values, eg; age Continuous No exact value and can be ordered, eg; weight How can information be displayed? Bar chart, pie chart, stem and leaf, histogram and scatter plot Another word for average Central tendency Another word for spread Measuring variability What is a census? A survey of the whole population What is the population? Entire group being studied What is the sample? Group selected from the population What is a parameter? Numerical measurement describing some characteristic of a population What is a statistic? Numerical measurement describing some characteristic of a sample What's a simple random sample? Every person has an equal chance of being selected What is a stratified random sample? Population split into subgroups then simple random sampled What's a systematic random sample? Random number picked, eg; 17, so every 17th person is picked What is cluster sampling? Population randomly divided into groups and some tested What is quota sampling? No probability, companies use this, population not random What is convenience sampling? Where the subjects are chosen in the most convenient way possible

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