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The survey records the credit card debt payoff for each of the 1019 adults in the sample. The sample of adults is randomly selected.

In the survey, the population desired to be studied was a collection of all adults with credit cards. Of the entire population, 1019 were selected as samples.

The selection was clearly stated to be random, which means each adult had even chances of being chosen in the sample.

When random selection is made for a sufficient number of experimental units by a trustworthy organization, the chances ofbiasednessreduce significantly.

As the samples were selected through random sampling, the chances of biased observations from the study are very low.

Also, the sample would be representative of the population.

Thus, the sampling method is considered to be sound.