Merge pull request udacity#77 from udacity/nicky/p3-typo

change typo in P3 reach to react

Author: jared-weed

projects/creating_customer_segments/customer_segments.ipynb

@@ -674,7 +674,7 @@
    },
    "source": [
     "### Question 10\n",
-    "Companies will often run [A/B tests](https://en.wikipedia.org/wiki/A/B_testing) when making small changes to their products or services to determine whether making that change will affect its customers positively or negatively. The wholesale distributor is considering changing its delivery service from currently 5 days a week to 3 days a week. However, the distributor will only make this change in delivery service for customers that react positively. *How can the wholesale distributor use the customer segments to determine which customers, if any, would reach positively to the change in delivery service?*  \n",
+    "Companies will often run [A/B tests](https://en.wikipedia.org/wiki/A/B_testing) when making small changes to their products or services to determine whether making that change will affect its customers positively or negatively. The wholesale distributor is considering changing its delivery service from currently 5 days a week to 3 days a week. However, the distributor will only make this change in delivery service for customers that react positively. *How can the wholesale distributor use the customer segments to determine which customers, if any, would react positively to the change in delivery service?*  \n",
     "**Hint:** Can we assume the change affects all customers equally? How can we determine which group of customers it affects the most?"
    ]
   },