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diff --git a/examples/ANOVA.html b/examples/ANOVA.html
@@ -700,7 +700,7 @@ <h2>Equivalence between ANOVA and OLS<a class="headerlink" href="#equivalence-be
   <th>Date:</th>             <td>Fri, 02 Feb 2024</td> <th>  Prob (F-statistic):</th> <td>1.11e-25</td>
 </tr>
 <tr>
-  <th>Time:</th>                 <td>17:10:49</td>     <th>  Log-Likelihood:    </th> <td> -139.86</td>
+  <th>Time:</th>                 <td>17:11:41</td>     <th>  Log-Likelihood:    </th> <td> -139.86</td>
 </tr>
 <tr>
   <th>No. Observations:</th>      <td>   100</td>      <th>  AIC:               </th> <td>   289.7</td>

diff --git a/examples/Mann-Whitney_U-test.html b/examples/Mann-Whitney_U-test.html
@@ -710,7 +710,7 @@ <h3>Example 1<a class="headerlink" href="#example-1" title="Permalink to this he
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;group&#39;, ylabel=&#39;score&#39;&gt;
 </pre></div>
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-<img alt="../_images/a8ad33aba31e36b178ecc3a511d2cc2e1a68b5c1285e83cacbd22df46b67cd9d.png" src="../_images/a8ad33aba31e36b178ecc3a511d2cc2e1a68b5c1285e83cacbd22df46b67cd9d.png" />
+<img alt="../_images/100c9adc13e3a83bb17052b4787f45fddd3051968c2cfed83d197b653a4126c8.png" src="../_images/100c9adc13e3a83bb17052b4787f45fddd3051968c2cfed83d197b653a4126c8.png" />
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diff --git a/exercises/exercises_21_discrete_RVs.html b/exercises/exercises_21_discrete_RVs.html
@@ -1166,7 +1166,7 @@ <h3>E2.16<a class="headerlink" href="#e2-16" title="Permalink to this heading">#
 </div>
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-<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>array([45, 36, 33, 41, 38, 37, 47, 41, 40, 48])
+<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>array([30, 44, 45, 43, 55, 40, 33, 32, 48, 39])
 </pre></div>
 </div>
 </div>

diff --git a/exercises/exercises_35_two_sample_tests.html b/exercises/exercises_35_two_sample_tests.html
@@ -584,7 +584,7 @@ <h3>E1. Permutation test for the sleep score sin the doctors<a class="headerlink
 </div>
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 <div class="cell_output docutils container">
-<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>0.0129
+<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>0.012
 </pre></div>
 </div>
 </div>
@@ -598,7 +598,7 @@ <h3>E1. Permutation test for the sleep score sin the doctors<a class="headerlink
 </div>
 </div>
 <div class="cell_output docutils container">
-<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>0.014198580141985802
+<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>0.011698830116988301
 </pre></div>
 </div>
 </div>

diff --git a/exercises/problems_1_data.html b/exercises/problems_1_data.html
@@ -571,7 +571,7 @@ <h2>Problem {prob:bar-chart_score-vs-curriculum}<a class="headerlink" href="#pro
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;curriculum&#39;, ylabel=&#39;score&#39;&gt;
 </pre></div>
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-<img alt="../_images/ba409ea5dad0ac7634a111da54e2a28b516becf4b8a76c1bbed52a6fb36ac371.png" src="../_images/ba409ea5dad0ac7634a111da54e2a28b516becf4b8a76c1bbed52a6fb36ac371.png" />
+<img alt="../_images/033b694a1b3c9033ec474a03eb1cc397eb781bcc3b9f482f2d298b672677265f.png" src="../_images/033b694a1b3c9033ec474a03eb1cc397eb781bcc3b9f482f2d298b672677265f.png" />
 </div>
 </div>
 </section>

diff --git a/exercises/solutions/exercises_31_estimtors.html b/exercises/solutions/exercises_31_estimtors.html
@@ -744,7 +744,7 @@ <h3>Exercise 3.4<a class="headerlink" href="#exercise-3-4" title="Permalink to t
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: ylabel=&#39;Count&#39;&gt;
 </pre></div>
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-<img alt="../../_images/ef13b602cd4fb7ec324575b304f2ebf5b57b12f4db6c8bdf43e2e0dad3af15fa.png" src="../../_images/ef13b602cd4fb7ec324575b304f2ebf5b57b12f4db6c8bdf43e2e0dad3af15fa.png" />
+<img alt="../../_images/d369d69b9c6a3e0ce5d92f0a5fb1c049c23cb27f9dda546b50f586a5aad72435.png" src="../../_images/d369d69b9c6a3e0ce5d92f0a5fb1c049c23cb27f9dda546b50f586a5aad72435.png" />
 </div>
 </div>
 </section>
@@ -790,7 +790,7 @@ <h3>Exercise 3.5<a class="headerlink" href="#exercise-3-5" title="Permalink to t
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;x&#39;, ylabel=&#39;$f_{X}$&#39;&gt;
 </pre></div>
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-<img alt="../../_images/7dea2e6e684010d2c3a3fc6a8135388e9a177781200e75b408787237924b2656.png" src="../../_images/7dea2e6e684010d2c3a3fc6a8135388e9a177781200e75b408787237924b2656.png" />
+<img alt="../../_images/e14a365ffabd3d86ea7969c39edd2b3f5e2d12e54cb2fb5b9ce069ee137f97f9.png" src="../../_images/e14a365ffabd3d86ea7969c39edd2b3f5e2d12e54cb2fb5b9ce069ee137f97f9.png" />
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@@ -813,7 +813,7 @@ <h3>Exercise 3.5<a class="headerlink" href="#exercise-3-5" title="Permalink to t
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;x&#39;, ylabel=&#39;$f_{X}$&#39;&gt;
 </pre></div>
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 <div class="cell_output docutils container">
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 </pre></div>
 </div>
 </div>
@@ -975,7 +975,7 @@ <h3>Exercise 3.8<a class="headerlink" href="#exercise-3-8" title="Permalink to t
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: ylabel=&#39;Density&#39;&gt;
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 </div>
 </div>
 <p>Even when we take into account of the possible variability
@@ -1032,7 +1032,7 @@ <h3>Exercise 3.9<a class="headerlink" href="#exercise-3-9" title="Permalink to t
 </div>
 </div>
 <div class="cell_output docutils container">
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 </div>
 </section>
@@ -1107,7 +1107,7 @@ <h3>Exercise 3.11<a class="headerlink" href="#exercise-3-11" title="Permalink to
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: ylabel=&#39;Density&#39;&gt;
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 </div>
 </div>
 <p>The boostrap etimates we obverve are very far from the
@@ -1205,7 +1205,7 @@ <h3>Exercise 3.12<a class="headerlink" href="#exercise-3-12" title="Permalink to
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;d&#39;, ylabel=&#39;$f_{D}$&#39;&gt;
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 </div>
 </section>
@@ -1230,7 +1230,7 @@ <h3>Exercise 3.13<a class="headerlink" href="#exercise-3-13" title="Permalink to
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: ylabel=&#39;Density&#39;&gt;
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@@ -1241,7 +1241,7 @@ <h3>Exercise 3.13<a class="headerlink" href="#exercise-3-13" title="Permalink to
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-<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>2.2456095388332247
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@@ -1271,7 +1271,7 @@ <h3>Exercise 3.14<a class="headerlink" href="#exercise-3-14" title="Permalink to
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@@ -1282,7 +1282,7 @@ <h3>Exercise 3.14<a class="headerlink" href="#exercise-3-14" title="Permalink to
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-<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>2.917097209457041
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diff --git a/notebooks/11_intro_to_data.html b/notebooks/11_intro_to_data.html
@@ -533,7 +533,7 @@ <h2>Random selection<a class="headerlink" href="#random-selection" title="Permal
 </div>
 </div>
 <div class="cell_output docutils container">
-<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>[2, 4, 10]
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@@ -555,7 +555,7 @@ <h2>Random assignment<a class="headerlink" href="#random-assignment" title="Perm
 </div>
 </div>
 <div class="cell_output docutils container">
-<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>control
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 </div>
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diff --git a/notebooks/12_data_in_practice.html b/notebooks/12_data_in_practice.html
@@ -2015,7 +2015,7 @@ <h3>Strip plot of the <code class="docutils literal notranslate"><span class="pr
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 </div>
 </div>
 <p>We can enhance the strip plot by mapping the <code class="docutils literal notranslate"><span class="pre">ezlvl</span></code> variable to the colour (hue) of the points in the plot.</p>
@@ -2029,7 +2029,7 @@ <h3>Strip plot of the <code class="docutils literal notranslate"><span class="pr
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 <div class="cell docutils container">
@@ -2404,7 +2404,7 @@ <h3>Electricity prices<a class="headerlink" href="#electricity-prices" title="Pe
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 </div>
 </div>
 </section>
@@ -2537,7 +2537,7 @@ <h3>Students’ scores<a class="headerlink" href="#students-scores" title="Perma
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 </div>
 </div>
 <div class="cell docutils container">
@@ -2664,7 +2664,7 @@ <h3>Kombucha volumes<a class="headerlink" href="#kombucha-volumes" title="Permal
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;batch&#39;, ylabel=&#39;volume&#39;&gt;
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 </div>
 </div>
 <section id="average-volume-of-the-sample-from-batch-01">
@@ -2775,7 +2775,7 @@ <h3>Doctors’ sleep study<a class="headerlink" href="#doctors-sleep-study" titl
 <div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;Axes: xlabel=&#39;score&#39;, ylabel=&#39;location&#39;&gt;
 </pre></div>
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+<img alt="../_images/6d62c37a81a37a2bcb438461427a9b3e766a747194669fa046fbd7ec9246126c.png" src="../_images/6d62c37a81a37a2bcb438461427a9b3e766a747194669fa046fbd7ec9246126c.png" />
 </div>
 </div>
 <section id="average-sleep-scores-for-doctors-in-different-locations">
@@ -2945,7 +2945,7 @@ <h3>Website visitors<a class="headerlink" href="#website-visitors" title="Permal
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 </div>
-<img alt="../_images/e53a26383ba389a1123eb0454c4852a68f8c4b03941c01bd13c2d65cab720219.png" src="../_images/e53a26383ba389a1123eb0454c4852a68f8c4b03941c01bd13c2d65cab720219.png" />
+<img alt="../_images/25cb4bb5b9e0c684917587d38c956cc3c055b202baca324b871f9adf636c6613.png" src="../_images/25cb4bb5b9e0c684917587d38c956cc3c055b202baca324b871f9adf636c6613.png" />
 </div>
 </div>
 <p>The black lines represent the estimates of the uncertainty of the true conversion rates