<p>When you consider the lower proportion of unanswered questions on AI overall, there doesn't seem to be much evidence that RL questions have a relatively higher chance of being answered there rather than here compared to other questions.  I obtained counts using the search terms: <code>-[reinforcement-learning] is:question  closed:no isanswered:yes</code>, etc., and conducted the following analysis:  </p>

  

<pre><code># input search data
x &lt;- data.frame(      site=c("CV","CV","AI","AI"), 
                    RL.tag=c(TRUE,FALSE,TRUE,FALSE), 
                  answered=c(341,71298,251,1831), 
                unanswered=c(242, 54360, 83, 761)   )

# fit saturated logistic regression model
glm(cbind(answered, unanswered)~site*RL.tag, data=x, family="binomial") -&gt; sat.mod

x  # print search data
#   site RL.tag answered unanswered
# 1   CV   TRUE      341        242
# 2   CV  FALSE    71298      54360
# 3   AI   TRUE      251         83
# 4   AI  FALSE     1831        761

summary(sat.mod)   # print model summary
# Coefficients:
#                   Estimate Std. Error z value Pr(&gt;|z|)    
# (Intercept)        0.87798    0.04313  20.357   &lt;2e-16 ***
# siteCV            -0.60674    0.04350 -13.947   &lt;2e-16 ***
# RL.tagTRUE         0.22863    0.13376   1.709   0.0874 .  
# siteCV:RL.tagTRUE -0.15692    0.15808  -0.993   0.3209    

confint(sat.mod,level = 0.95)  # print confidence intervals around parameter estimates
#                         2.5 %     97.5 %
# (Intercept)        0.79392982  0.9630236
# siteCV            -0.69250867 -0.5219484
# RL.tagTRUE        -0.02926792  0.4957067
# siteCV:RL.tagTRUE -0.47007321  0.1500825
</code></pre>

<p>But I'd caution against reading too much into this kind of analysis&mdash;that doesn't control for the different types or varying quality of questions that get asked on the two sites. And tagging behaviour needs to be thought about; e.g., we've got 65 questions with <a href="https://stats.stackexchange.com/questions/tagged/multiarmed-bandit" class="post-tag" title="show questions tagged &#39;multiarmed-bandit&#39;" rel="tag">multiarmed-bandit</a> but without <a href="https://stats.stackexchange.com/questions/tagged/reinforcement-learning" class="post-tag" title="show questions tagged &#39;reinforcement-learning&#39;" rel="tag">reinforcement-learning</a>. And who's to say that comparisons made now will be valid in a year's time, especially if there are only a few users answering RL questions on each site?</p>
