search for: sd_mean_temp

...mpute the distribution free test for the slope of a postulated regression line (Theil test). As I am testing the null hypothesis that slope = 0 against the general alternative the slope does not equal 0, it should be pretty straight-forward. I have a data frame as follows; index Score Mean_Temp SD_Mean_Temp i 10 3.7 0.65 i+1 12 7.5 2.11 i+2 6 10.3 0.85 ... ... ... ... n 8 12.6 4.2 The first question is how can I compute the n(n-1)/2 differences between Score i and Score j where i is from 1 to (n-1) and j is from (i+1) to n? I would then like R to spit out the differences in a file something lik...