Collecting data
This is a View Only copy of our class data. You can use it by making a copy FIRST! Remember to move it into your Math folder on Google Drive.
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Processing data
We are going to use the data collected from 7C to construct a scatter plot to see if there is a relationship between height and arm span. Before we do that, what is your prediction?
Analysing data
Have a look at the scatter plot you have made with the data from 7C's heights versus arm spans. Can you describe what is happening to the arm span when height increased?
When two sets of data are linked together we can say that they have a correlation. Sometimes the correlation is positive and sometimes it is negative. If the two sets of data has no relationship, then we say that there is no correlation. Here are some examples:
When two sets of data are linked together we can say that they have a correlation. Sometimes the correlation is positive and sometimes it is negative. If the two sets of data has no relationship, then we say that there is no correlation. Here are some examples:
The correlation is positive when both sets of data increase together. Eg: When the hours of sleep increase, the test scores increase too.
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There is no correlation if there are no obvious patterns you can see on the scatter plot.
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The correlation is negative when one set of data decreases as the other set increases. Eg: When the hours of exercise increase, the resting heart rate decrease.
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