What sample size should be extracted for a reliability test?

There is no standard for the sample size used in a reliability test. In traditional research, it is suggested to select 10-15% of total data as the sample for reliability test. However, in big data research, even a 10% sample may contain a significant volume of data. Therefore, it is acceptable for current researches to reduce the sample size ratio of reliability test. The specific sample size should be determined based on research requirements and expectations of journal reviewers or mentor.

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