A magazine tested paints. The table below shows the overall quality score and cost in dollars per gallon. Use the rank correlation coefficient to test for a correlation between the two variables. Use a significance level of alpha equals 0.05. Based on these​ results, do you get better quality paint by paying​ more?   a. Calculate the test statistic. r s equals  (Round to three decimal places as​ needed.)     b. Find the critical values. r s equals plus or minus ​(Round to three decimal places as​ needed.)

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