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(upbeat synth music)
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- [Instructor] In this chapter, we have looked at
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covariance and correlation as measures
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of how data varies within a data set.
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I'd like to challenge you to work
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with the problem set forward
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in the Chapter 5 Challenge Workbook,
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which you can find in the Chapter 5 folder
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of the exercise files collection.
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I would like you to find the covariance
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between the values in the customers and sales columns,
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those are in A and B.
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Also the correlation of those same two columns,
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and then create a 3x3 grid
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that will determine the correlation of each column
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as paired with other columns.
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Remember, as a hint, that anytime you get the correlation
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of a column with itself,
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the values should be one
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because the values are exactly identical.
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So that means that cells G8, H9,
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and I10 should all contain the values of one.
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With that in mind, go ahead and try the problem.
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And I will be back in the next movie
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to show you how I would solve it.
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