Does deferring javascript reduce the Session capture rate for fast bounces?

On PageSpeed Insights, I get these warnings:
Remove render-blocking JavaScript:
/wp-includes/js/jquery/jquery.js?ver=1.12.4
/wp-content/plugins/better-analytics/js/loader.php?ver=1.2.3.js
Can I […]

See original post by invalid@example.com (Robert Wagnon)