Scatter Plot
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A graphical tool used to display the relationship
b/w an X and Y variable.
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It shows a correlation between the variables
(X & Y coordinates).
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The pattern tells us about the nature and strength
of the X & Y relationship used a first hand information.
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The closer the data points come when plotted
to make a straight line, the higher is the correlation
between variables.
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If the data points make a straight line going from the
origin out to high X and Y values, then the variables
are said to have a +ve correlation (Vice-versa)
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Let us see an example of scatter plot;
to find the relationship between the sleep
hours per day Vs the age.
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We can see from the scatter plot that there exists
a negative correlation between the sleep hours
per day and the age.
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This indicates that for every increase in age there
will be decrease in the sleep hours.
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The R square value of 85% indicates the model fits
the data.
