A manager of a local retail store analyzes the relationship between advertising and sales by reviewing the store's data for the previous six months. The data is found in the table below and in the excel file: store.xlsx Advertising | Sales 21 | 20 28 | 24 23 | 21 21 | 16 22 | 19 29 | 24 Calculate the correlation coefficient between advertising and sales (round to 2 decimal places).
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Mean of advertising (X̄) = (21 + 20 + 28 + 24 + 23 + 21) / 6 = 22.5 Mean of sales (Ȳ) = (21 + 16 + 22 + 19 + 29 + 24) / 6 = 21.83 Show more…
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