To construct a confidence interval for the difference between two population means HA - u2, use the formula shown below when both population standard deviations are known, and either both populations...

Extracted text: To construct a confidence interval for the difference between two population means HA - u2, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n, 2 30 and n, 2 30. Also, the samples must be randomly selected and independent (* 2) - < (x1="" -x2="" +z¢="" the="" descriptive="" statistics="" for="" the="" annual="" salaries="" from="" a="" random="" sample="" of="" microbiologists="" from="" two="" regions="" are="" shown="" below="" construct="" a="" 95%="" confidence="" interval="" for="" the="" difference="" between="" the="" mean="" annual="" salaries.="" x,="$107" 250,="" n,="41," and="" o,="S9120," x,="585.250," n,="35," and="" o,="$9135" complete="" the="" 95%="" cenfidence="" interval="" for="" u,="" -="" 2="" below.="" (round="" to="" the="" nearest="" dollar="" as="">