Association between variables – covariance and correlation

In the previous chapter, we introduced correlation concepts, and it is now necessary to deepen these concepts. This will help us understand how to use this information in advance and find possible relationships between variables. Let's start with a real example: a company at the launch of a new printer model wants to analyze sales at a number of stores to determine the best price. The following table shows the sales of the product in the last month and the sale price for these stores:

Store

SoldItems

Price

Store

SoldItems

Price

Store1

100

60

Store11

145

42

Store2

150

43

Store12

125

47

Store3

130

48

Store13

135

44

Store4

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