A regional manager at Acme Markets would like to develop a model to predict the weekly sales of pet food based on the shelf space allotted to the food. The following table shows the results of data collected from nine randomly selected stores. These data can also be found in the Excel file Acme. xlsx.

a. Calculate the Spearman rank order correlation coefficient.
b. Using α = 0.05, perform a hypothesis test to determine if the population rank correlation coefficient is greater than zero.

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