The first article “Accuracy of Data in Abstracts of Published Articles” uses the random sampling technique.
Random Sampling
The term refers to a random sample selection procedure, in which all members of the population have an equal chance of being selected. The purpose of a random sample - to make sure that the final sample to be measured is representative for the entire population from which it was taken. The purpose of a random sample - to make sure that the final sample to be measured is representative for the entire population from which it was taken. ...