It depends upon first of all the age group you blong to. 
Then they would check your finacial status, valid reason to 
visit Canada, family back ground and conform that you come 
back to your country.

actually i was denied when i was almost graduating from 
college, and i dont have enough money that time, i only 
have 300,000 pesos on my savings acct, so maybe if i have 
more than that i think thats one thing, and im single so i 
dont know how to prove to them that ill come back in the 
philippines,coz we dont have a big business that time that 
i can say that im the one the proprietor.but now i think, 
it easier to get someone as ur immediate rather than just a 
niece or nephew.