# SAMPLING ERRORS AND DEVIATION

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What are non sampling errors? give 5 examples
Errors that occur regardless of techniques, e.g. hard questions, pressure, private data, influential questions, leading questions
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What is a sampling error?
The difference between mean value and actual value
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What is a scatter graph used for?
The correlation between two variables
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What are 2 advantages of extrapolation?
Helps to preplan, helps set objectives
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it's not accurate, people may become complacent, competitors may see
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What is standard deviation?
How spread out data is compared to a mean
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How do you work out standard deviation?
calculate mean, see how much it deviates compared to mean & square it, add the squared numbers, divide by the number of them
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## Other cards in this set

### Card 2

#### Front

What is a sampling error?

#### Back

The difference between mean value and actual value

### Card 3

#### Front

What is a scatter graph used for?

### Card 4

#### Front

What are 2 advantages of extrapolation?