You add the Google Surveys JavaScript snippets to Blogger in different sections of the Layout tab.
1. Navigate to the Layout tab in your Blogger account:
2. Click the topmost Add a Gadget box, and from the menu choose HTML/JavaScript:
3. Rename gadget, place this JavaScript snippet in the Content box, then click Save:
<script type="text/javascript">
(function() {
var ARTICLE_URL = window.location.href;
var CONTENT_ID = 'everything';
document.write(
'<scr'+'ipt '+
'src="//survey.g.doubleclick.net/survey?site=_GSACCOUNTID'+
'&url='+encodeURIComponent(ARTICLE_URL)+
(CONTENT_ID ? '&cid='+encodeURIComponent(CONTENT_ID) : '')+
'&random='+(new Date).getTime()+
'" type="text/javascript">'+'\x3C/scr'+'ipt>');
})();
</script>