if you have a keyword rich domain, sometimes you will end up ranking well with a parked domain for less competitive terms. if thats what you are asking..
If you are using a parked domain service, like godaddy or some of the others, you won't rank at all. Google has those thumbprinted and they have 0 SEO value. You could put up a WP blog and some AdSense and you could do ok possibly if you have a few articles on there. Parked domains are for direct traffic first and foremost.
"Parket Domains" are stupid when it comes to SEO. Google has a "Site Age Factor" that is important. The Age starts when the site is indexed for the first time. Parking a domain has no pages to be indexed. Therefore no Age.