update image file path

02/3/establishing-causality.md

@@ -52,6 +52,3 @@ cancer, but it did not cause the disease.
 Confounding factors are common in observational studies. Good studies take great
 care to reduce confounding and to account for its effects.
 
-```python
-
-```

05/1/.ipynb_checkpoints/Arrays-checkpoint.ipynb

@@ -296,7 +296,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.12"
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,

05/1/Arrays.ipynb

@@ -296,7 +296,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.12"
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,