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.

Pros: CashKarma operates within an app, which makes for a simple, self-contained user experience. You can also watch videos, complete sign-up offers and earn bonus achievement badges. Plus, you’ll still earn points even if you don’t qualify for a survey — based on the amount of time you spend in a survey you’re screened out of — and you’ll earn an easy five points a day when you check in.
Allan Liwanag is a personal finance blogger who paid off at least $40K debt in 3 years by adopting simple and extreme saving techniques while ensuring his family's needs were taken care of. An analyst by day and dedicated blogger by night, he loves to share his thoughts - based on his research, personal knowledge, and experience - on topics related to family, life, and money. Allan lives with his family in Maryland, USA.
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