Merge pull request sux13#19 from Kerredai/master

Fixes two small typos

Author: sux13

1_DATASCITOOLBOX/Data Scientists Toolbox Course Notes.Rmd

@@ -20,13 +20,14 @@ $\pagebreak$
 * `pwd` = print working directory (current directory)
 * `clear` = clear screen
 * `ls` = list stuff
-    *  `-a` = see all (hidden)
+    *  `-a` = see all (including hidden files)
     *  `-l` = details
 * `cd` = change directory
 * `mkdir` = make directory
 * `touch` = creates an empty file
 * `cp` = copy
     * `cp <file> <directory>` = copy a file to a directory
+    * `cp <file> <renamed_file>` = rename a file
     * `cp -r <directory> <newDirectory>` = copy all documents from directory to new Directory
             * `-r` = recursive
 * `rm` = remove
@@ -102,7 +103,7 @@ $\pagebreak$
 * **Big data** = now possible to collect data cheap, but not necessarily all useful (need the right data)
 
 ## Experimental Design
-* Formulate you question in advance
+* Formulate your question in advance
 * **Statistical inference** = select subset, run experiment, calculate descriptive statistics, use inferential statistics to determine if results can be applied broadly
 * ***[Inference]*** **Variability** = lower variability + clearer differences = decision
 * ***[Inference]*** **Confounding** = underlying variable might be causing the correlation (sometimes called Spurious correlation)
@@ -118,5 +119,5 @@ $\pagebreak$
     * **Accuracy** = Pr(correct outcome)
 * **Data dredging** = use data to fit hypothesis
 * **Good experiments** = have replication, measure variability, generalize problem, transparent
-* Prediction is not inference, and be ware of data dredging
+* Prediction is not inference, and beware of data dredging