fixing a typo

Author: agroutsmith

docs/source/notebooks/did_pymc_banks.ipynb

@@ -522,7 +522,7 @@
    "source": [
     "## Analysis 2 - DiD with multiple pre/post observations\n",
     "\n",
-    "Now we'll do a difference in differences analysis of the full dataset. This approach has similarities to CITS (Comparative Interrupted Time Series) with a single control over time. Although slighyly abitrary, we distinguish between the two techniques on whether there is enough time series data for CITS to capture the time series patterns."
+    "Now we'll do a difference in differences analysis of the full dataset. This approach has similarities to CITS (Comparative Interrupted Time Series) with a single control over time. Although slightly abitrary, we distinguish between the two techniques on whether there is enough time series data for CITS to capture the time series patterns."
    ]
   },
   {