Mathematics, 13.11.2019 03:31 electrofy456
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
1.09 to 4.08
0.07 to 1.9
1.08 to 2.92
1.9 to 2.08
Answers: 2
and 
be the population mean of hourly wages of employees of two branches of a department store (Downtown Store and North Mall Store)
.
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