Ask HN: What is good healthy bounce rate and New/Returning users ratio?

we just launched our side project http://www.jackpotbuddy.com about 3 weeks ago.

Just wondering what would be a good bounce rate and new/returning users ratio?

Here are few of our stats:

Avg / Visit: 7.40

Avg. Visit Duration: 00:05:49

Bounce Rate: 23.73% %

New Visits: 67.24%