Question: Problem - Statistics for decision making Researchers at an R&D agency believe that the sales volume of fuel oil (B) is correlated with the number

Problem - Statistics for decision making Researchers at an R&D agency believe that the sales volume of fuel oil (B) is correlated with the number of sales of oil-fueled cars (M). Collected monthly data for both variables for the last five years (n-60). He was surprised to find the result r(BM)=0.

What does the correlation coefficient mean, why can it be zero (0).

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