n><span class='op'>(</span><span class='st'>"2020-03-20"</span><span class='op'>)</span><span class='op'>)</span>
<span class='op'>}</span>
<span class='co'>## The result of the code above is equivalent to:</span>
<span class='fu'><a href='https://rdrr.io/r/utils/data.html'>data</a></span><span class='op'>(</span><span class='va'>securities_returns</span><span class='op'>)</span>
<span class='fu'>sign_test</span><span class='op'>(</span>list_of_returns <span class='op'>=</span> <span class='va'>securities_r