# Statistics

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What is qualitative?
Variables do not have a numerical value e.g. place of birth, colour of car, gender
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What is quantitative?
Variable do have a numerical value, they can be discrete or continuous
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What is discrete?
Variables take values which change in steps e.g. 0,1,2,3.. i.e. they can be counted
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What is continuous?
variables can take any value in an interval i.e. they are measured
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what is primary data?
this is data which has been collected for a specific investigation
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what is secondary data?
this is data published by the government and other organisations, not collected for a specific investigation
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What is a population?
it is all the possible data
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what is a sample?
is a part or selection of data
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what is a parameter?
is a numerical property of a population e.g the mean height of all adult females in the uk is a parameter
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what is a statistic?
a numerical property of a sample e.g. the mean height of the adult females in the sample
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how can you avoid bias?
by taking a random sample
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what is a simple random sample?
random samples selected without replacement
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## Other cards in this set

### Card 2

#### Front

What is quantitative?

#### Back

Variable do have a numerical value, they can be discrete or continuous

### Card 3

#### Front

What is discrete?

### Card 4

#### Front

What is continuous?

### Card 5

#### Front

what is primary data?