We wish to estimate the mean weight of all men from a country with a 90% confidence level and a margin of error 2.6 lb. Assume that the population standard deviation is known to be 15.08 lb. A) Read carefully the text and provide each of the following: The error is E= , the population standard deviation o= , the confidence level is CL = %. B)  Find the critical value za2 which is the zscore for which the right area is ?2. za2= (Hint: keep in mind that a=1−the confidence level) C) How large should the sample size be?

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We wish to estimate the mean weight of all men from a country with a 90% confidence level and a margin of error 2.6 lb. Assume that the population standard deviation is known to be 15.08 lb.

A) Read carefully the text and provide each of the following:

The error is E=
,
the population standard deviation o=
,
the confidence level is CL =
%.

B)  Find the critical value za2 which is the zscore for which the right area is ?2.

za2=


(Hint: keep in mind that a=1−the confidence level)

C) How large should the sample size be?

n=

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