A Proposed Method for Choice of Sample Size without Pre-Defining Error

• 作者: Hang Ho Loc Nguyen
• 来源期刊: 数据分析和信息处理(英文)
• 学科: 医学
• 关键词: SAMPLE SIZE CHOICE of SAMPLE SIZE Pre-Defined ERROR
• 年，卷（期）: 2015,（4）
• 页码范围: 163-167
• 页数: 5页
• 分类号: R73

摘要

Sample size is very important in statistical research because it is not too small or too large. Given significant level α, the sample size is calculated based on the z-value and pre-defined error. Such error is defined based on the previous experiment or other study or it can be determined subjectively by specialist, which may cause incorrect estimation. Therefore, this research proposes an objective method to estimate the sample size without pre-defining the error. Given an available sample X = {X1, X2, ..., Xn}, the error is calculated via the iterative process in which sample X is re-sampled many times. Moreover, after the sample size is estimated completely, it can be used to collect a new sample in order to estimate new sample size and so on.