Is the number of years of competitive running experience related to a runner's distance running performance? The data on nine runners, obtained from the study by Scott Powers and colleagues, are shown in the table:6

a. Calculate the rank correlation coefficient between years of competitive running x and a runner's finish time y in the 10-kilometer race.
b. Do the data provide evidence to indicate a significant rank correlation between y and x? Test using α =.05.

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Years of Competiive 10-Kilometer Finish Running Runner Time (minutes) 33.15 33.33 33.50 33.55 33.73 33.86 33.90 34.15 34.90 13 12