Sample size for the Z test and its confidence interval

Author： Steven Liu Xiaofeng  

Publisher： Taylor & Francis Ltd

ISSN： 1464-5211

Source： International Journal of Mathematical Education in Science and Technology, Vol.43, Iss.2, 2012-03, pp. : 266-270

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Abstract

The statistical power of a significance test is closely related to the length of the confidence interval (i.e. estimate precision). In the case of a Z test, the length of the confidence interval can be expressed as a function of the statistical power.

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