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In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been
In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered.
Downtown store North Mall Store
Sample size 25 20
sample mean $9 $8
Sample standard deviation $2 $1
A 95% interval estimate for the difference between the two population means is?
I'm having trouble regarding this question I can't seem to figure out where to start at with the interval estimate
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