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30-10-2016
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If 95% and 98% confidence intervals were developed to estimate the true cost of an mp3 player with a known population standard deviation, what differences would they have?

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Аноним Аноним

08-11-2016

Below are the choices that I manage to check from other source:

A.Standard errors
B.Interval widths
C.Z-statistic
D.Both b and c

The answer is D which is Both b and c.
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