Domain Age Plays important Role in Google search ranking

Is Domain Age Plays important Role in Google search Ranking ?

There are many questions to answers,such as I have a domain which is four years old i have not setup hosting for that. if i use that domain to launch website will that help me in rankings? if, no then what factors in domain age are considered by Google ? 

One SEO related question which is often asked throughout webmaster forums is how muchdomain registration age is important for SEO. The points behind this question include:

• well-established sites have old domain names, so by reverse logics, an old domain should mean that the site is well established;
• spammers register and drop domains quickly, thus logically spamming sites usually have newly registered domain names.