Question: A consultant conducts a pilot study to estimate a population
A consultant conducts a pilot study to estimate a population standard deviation, then determines how large a simple random sample will be necessary to have a given level of confidence that the difference between x-bar and μ will be within the maxi mum error specified by her client. The necessary sample size has been calculated as n = 100. If the client suddenly decides that the maximum error must be only one fourth that originally specified, what sample size will now be necessary?
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