682 CHAPTER 13 Nonparametric Tests Nonlinear Pattern Rank Correlation Access tech supplements, videos, and data sets at www.TriolaStats.com TECH CENTER Statdisk 1. Click Analysis from the top menu. 2. Select Rank Correlation from the dropdown menu. 3. Enter a significance level and select the two data columns to be included. 4. Click Evaluate. StatCrunch 1. Click Stat in the top menu. 2. Select Nonparametrics from the dropdown menu and Spearman’s Correlation from the submenu. 3. Select the columns to be used in the analysis. 4. Under Display check Two-sided P-value. 5. Click Compute! Minitab 1. Enter the paired data in columns C1 and C2. 2. Click Stat in the top menu. 3. Select Basic Statistics from the dropdown menu and select Correlation from the submenu. 4. Select the columns C1 and C2 to be included under Variables. 5. Click the Options button, select Spearman correlation for Method and enter the desired confidence level. 6. Click OK twice. TI-83, 84 Plus Calculator The TI-83>84 Plus calculator is not designed to calculate rank correlation, but we can replace each value with its corresponding rank and calculate the value of the linear correlation coefficient r. 1. Replace each sample value with its corresponding rank and enter the paired ranks in lists L1 and L2. 2. Press K, then select TESTS in the top menu. 3. Select LinRegTTest in the menu and press [. 4. Enter the list names for the x and y variables. Enter 1 for Freq and for b & r select 3 0 to test the null hypothesis of no correlation. 5. Select Calculate and press [. Because the calculation of r is done using ranks, the value shown as r is actually the rank correlation coefficient rs. Ignore the P-value because it is using the methods of Chapter 10, not the methods of this section.
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