Updates and corrections

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3,10']
+        python-version: ['3.10']
 
     steps:
       - uses: actions/checkout@v2
@@ -34,4 +34,3 @@ jobs:
       - name: Run tests
         run: |
           make tests
-

solutions/chap01soln.ipynb

@@ -605,7 +605,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Select the `birthord` column, print the value counts, and compare to results published in the [codebook](ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSFG/Cycle6Codebook-Pregnancy.pdf)"
+    "Select the `birthord` column, print the value counts, and compare to results published in the [codebook](https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSFG/Cycle6Codebook-Pregnancy.pdf)"
    ]
   },
   {
@@ -672,7 +672,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Select the `prglngth` column, print the value counts, and compare to results published in the [codebook](ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSFG/Cycle6Codebook-Pregnancy.pdf)"
+    "Select the `prglngth` column, print the value counts, and compare to results published in the [codebook](https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSFG/Cycle6Codebook-Pregnancy.pdf)"
    ]
   },
   {
@@ -1477,30 +1477,61 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "What was the birthweight of the first baby born to the respondent with `caseid` 5012?"
+    "What was the birthweight of the first baby born to the respondent with `caseid` 5013?"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 28,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "5515    6.0\n",
+       "5516    7.0\n",
+       "5517    NaN\n",
+       "5518    8.0\n",
+       "5519    8.0\n",
        "Name: birthwgt_lb, dtype: float64"
       ]
      },
-     "execution_count": 28,
+     "execution_count": 32,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
     "# Solution\n",
     "\n",
-    "preg[preg.caseid==5012].birthwgt_lb"
+    "# One solution is the select all pregnancies with this `caseid` \n",
+    "# and assume that the first valid value is the birthweight of\n",
+    "# the first baby\n",
+    "preg[preg.caseid==5013].birthwgt_lb"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "5516    7.0\n",
+       "Name: birthwgt_lb, dtype: float64"
+      ]
+     },
+     "execution_count": 33,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Solution\n",
+    "\n",
+    "# A more complete solution uses `pregordr` to select the first baby\n",
+    "\n",
+    "preg[(preg.caseid==5013) & (preg.pregordr==1)].birthwgt_lb"
    ]
   },
   {

solutions/chap04soln.ipynb

@@ -850,7 +850,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.11"
+   "version": "3.8.16"
   }
  },
  "nbformat": 4,