Select a representative sample: Selecting a representative sample from your sampling frame is also important for collecting valid and reliable data about the population of interest. For example, if you are sampling from a large database of customer email addresses and only wanted one response per household, you might want to cross-check each email address against mailing addresses and remove duplicates to avoid some households having a greater probability of selection. Then you would likely draw a random sample from the remaining list of email addresses.
How It Works: Swagbucks is a favorite of mine,  as well as a favorite of many readers here. Not only do they offer a wide range of surveys that pay cash, but you can also earn points for the everyday things you do online like searching, shopping, and watching videos. In total, Swagbucks has paid out over $187 million in rewards. Even if you’re not interested in doing surveys, it’s still easy on the platform to earn decent money with what you’re already doing online today.
You’ll be able to cash out your points either through PayPal or with a gift card. Survey Junkie claims you can get your cash out instantly, but this isn’t necessarily true. In most cases, if you request a payout through PayPal and it can take up to 24 hours, but in most cases it is immediate. Compared to other sites out there, this is a huge advantage. Some companies and sites can make you wait several days or even weeks. Sign up for Survey Junkie HERE. 
In the middle of all of this is a new breed of research corporation that relies on you – the survey taker – to determine this information.  For your time?  Many survey companies will pay you to take surveys for money or for other cash alternatives like gift cards or physical prizes and rewards. It depends upon the company as to whether they'll offer money or other offers and special deals.

i belong to onlycash, mommytalk, talkbacksurveys There was a fourth one I joined ….called watch and tell, or something similar…….(they originally had another name) …Somehow I deleted the site, …and cannot find it when searching for it. It was related to the first sites I named. ….I was ready to cash out, …and cannot find it. Anyone know the name?????
“I participated in an in-home product trial study. A coffee machine company sent me one of the coffee makers along with about 200 coffee pods. I received $7 for completing 3 short surveys. Plus, after the study, the company said I could keep the coffee maker. So, I got like 4 mos of coffee for everyone in my household, a free coffee maker and $7!” - David W.
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