Hello, Irene,
It's not posible to show the correct answers in the statistics.
You only know these.
But you can display the correct answers separately.
In my opinion there are several ways.
1. If you do not allow to go back to previous questions, you can use a question of type "text display" where you display the correct answers, maybe with a little bit of explanation. This is the last question of the survey.
But maybe the respondents won't submit if the see that they were wrong too many times.
2. In the template editor change the "completed.pstpl". At the moment there is not too much HTML.
Code:
<br />
<table class="completed-table">
<tr>
<td class="completed-text">
<br />
{COMPLETED}
<br />
<br />
{URL}
<br /><br />
</td>
</tr>
</table>
<br />
Here you can insert the correct answers, display the answer of the respondents, etc.
Best regards
Joffm