diff --git a/modules/lab4/lab4-4.ipynb b/modules/lab4/lab4-4.ipynb
index 3fa9d7a7..de402687 100644
--- a/modules/lab4/lab4-4.ipynb
+++ b/modules/lab4/lab4-4.ipynb
@@ -87,21 +87,20 @@
     "def mann_kendall(V, alpha=0.05):\n",
     "    '''Mann Kendall Test (adapted from original Matlab function)\n",
     "       Performs original Mann-Kendall test of the null hypothesis of trend absence in the vector V, against the alternative of trend.\n",
-    "       \n",
     "       The result of the test is returned in reject_null:\n",
     "       reject_null = True indicates a rejection of the null hypothesis at the alpha significance level. \n",
     "       reject_null = False indicates a failure to reject the null hypothesis at the alpha significance level.\n",
-    "       \n",
+    "\n",
     "       INPUTS:\n",
     "       V = time series [vector]\n",
     "       alpha =  significance level of the test [scalar] (i.e. for 95% confidence, alpha=0.05)\n",
     "       OUTPUTS:\n",
-    "       H = test result [1] Reject of Null Hypthesis [0] Insufficient evidence to reject the null hypothesis\n",
+    "       reject_null = True/False (True: reject the null hypothesis) (False: insufficient evidence to reject the null hypothesis)\n",
     "       p_value = p-value of the test\n",
     "       \n",
     "       From Original Matlab Help Documentation:\n",
-    "       The significance level of a test is a threshold of probability a agreed\n",
-    "       to before the test is conducted. A typical value of alpha is 0.05. If the p-value of a test is less than alpha,\n",
+    "       The significance level of a test is a threshold of probability a agreed to before the test is conducted. \n",
+    "       A typical value of alpha is 0.05. If the p-value of a test is less than alpha,        \n",
     "       the test rejects the null hypothesis. If the p-value is greater than alpha, there is insufficient evidence \n",
     "       to reject the null hypothesis. \n",
     "       The p-value of a test is the probability, under the null hypothesis, of obtaining a value\n",
@@ -114,7 +113,7 @@
     "       \n",
     "       Original written by Simone Fatichi - simonef@dicea.unifi.it\n",
     "       Copyright 2009\n",
-    "       $Date: 2009/10/03 $\n",
+    "       Date: 2009/10/03\n",
     "       modified: E.I. (1/12/2012)\n",
     "       modified and converted to python: Steven Pestana - spestana@uw.edu (10/17/2019)\n",
     "       '''\n",