Merge pull request datacamp#78 from datacamp/maintenance

ch4ex14 fix SCT msg

chapter4.md

@@ -1169,7 +1169,7 @@ Ex().check_correct(
 
 missing = "Have you used `np.corrcoef()` to calculate the correlation?"
 incorrect1 = "To calculate `corr`, the first argument to `np.corrcoef()` should be the first column of `np_baseball`, similar to how did it before."
-incorrect2 = "To calculate `corr`, the second argument to `np.corrcoef()` should be the second column of `np_baseball`. Instead of `[:,1]`, use `[:,2]` this time."
+incorrect2 = "To calculate `corr`, the second argument to `np.corrcoef()` should be the second column of `np_baseball`. Instead of `[:,0]`, use `[:,1]` this time."
 Ex().check_correct(
   check_object("corr").has_equal_value(),
   check_function("numpy.corrcoef", index=0, missing_msg=missing).multi(