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Statistics 7 Online
OpenStudy (anonymous):

What sample size is needed so that the standard deviation of the sampling distribution for \bar x is 0.01 grams per mile ?

OpenStudy (amistre64):

assuming the value of z is 1 ... and you are looking for the standard error (the standard distribution of the mean of the sample means) ... and as a rule of thumb when nothing else is given then p=q=.5 E = z sqrt(pq/n) becomes .01= sqrt(.5^2/n) solve for n

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