Corlation, Basic Statistics

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1. Calculate Karl Pearson’s coefficient of correlation between expenditure on advertising (X) and sales (Y) from the data given below: The management decided to stop further expenses for advertisement, if there is only less correlation between the sales. You are required to advice management. (3 Marks)

X: 39 65 62 90 82 75 25 98 36 78

Y: 47 53 58 86 62 68 60 91 51 84

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