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Instruction 7-7
Online customer service is a key element to successful online retailing.According to a marketing survey,37.5% of online customers take advantage of the online customer service.Random samples of 200 customers are selected.
-Referring to Instruction 7-7,the standard error of all possible sample proportions is ________.
Extraembryonic Membrane
Membranes outside the embryo, such as the amnion, chorion, yolk sac, and allantois, that provide protection and nourishment in vertebrate embryos.
Outermost Membrane
The most external membrane that encloses a cell or organelle, serving as a protective barrier and mediating interactions with the external environment.
Extraembryonic Membrane
A set of tissues formed by embryos of amniotes (reptiles, birds, and mammals) that provide support and protection but do not form part of the body of the embryo itself.
Blood Vessels
Blood vessels are tubular structures carrying blood throughout the body, including arteries, veins, and capillaries.
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