Merge pull request CamDavidsonPilon#281 from mdbecker/master

Chapter1: Fix one more missing space in headers

Author: CamDavidsonPilon

Chapter1_Introduction/Chapter1.ipynb

@@ -380,7 +380,7 @@
      "source": [
       "_______\n",
       "\n",
-      "##Probability Distributions\n",
+      "## Probability Distributions\n",
       "\n",
       "\n",
       "**Let's quickly recall what a probability distribution is:** Let $Z$ be some random variable. Then associated with $Z$ is a *probability distribution function* that assigns probabilities to the different outcomes $Z$ can take. Graphically, a probability distribution is a curve where the probability of an outcome is proportional to the height of the curve. You can see examples in the first figure of this chapter. \n",

Chapter2_MorePyMC/Chapter2.ipynb

@@ -655,7 +655,7 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "#####Example: Bayesian A/B testing\n",
+      "##### Example: Bayesian A/B testing\n",
       "\n",
       "A/B testing is a statistical design pattern for determining the difference of effectiveness between two different treatments. For example, a pharmaceutical company is interested in the effectiveness of drug A vs drug B. The company will test drug A on some fraction of their trials, and drug B on the other fraction (this fraction is often 1/2, but we will relax this assumption). After performing enough trials, the in-house statisticians sift through the data to determine which drug yielded better results. \n",
       "\n",