Correlation

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  • Created by: Steff06
  • Created on: 10-05-16 10:59
What is a correlation?
Measure of how strongly 2 variables are related to each other.
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What is a positive correlation?
Means that high values of 1 variable are associated with high values of another variable. They both increase together.
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What is a negative correlation?
As 1 variable increases, the other will decrease. High values of 1 variable are associated with low values of another.
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What is said if there is no correlation between 2 variables?
They are said to be uncorrelated.
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What does a correlation coefficient refer to?
A number between +1 and -1. It states how strong a correlation is. A number close to +1 means there is a positive correlation, whilst a number close to -1 means there is a negative correlation.If the number is close to 0, they are uncorrelated.
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What does correlational analysis involve?
Quantitative data.
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What is required for a scattergram?
Axis labelled and a title.
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What may a scattergram show?
Whether there is a strong positive correlation, a weak positive correlation, no correlation, a weak negative correlation or a strong negative correlation.
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What are the issues with scattergrams?
They do not allow us to make conclusions about the hypothesis and cannot demonstrate a cause and effect relationship between variables.
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Other cards in this set

Card 2

Front

What is a positive correlation?

Back

Means that high values of 1 variable are associated with high values of another variable. They both increase together.

Card 3

Front

What is a negative correlation?

Back

Preview of the front of card 3

Card 4

Front

What is said if there is no correlation between 2 variables?

Back

Preview of the front of card 4

Card 5

Front

What does a correlation coefficient refer to?

Back

Preview of the front of card 5
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