Question: To construct a confidence interval for the difference between two population means 12, use the formula shown below when both population standard deviations are known,

To construct a confidence interval for the difference between two population means

12, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n130 and n230.

Also, the samples must be randomly selected and independent.

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.

x1=$107,380, n1=37, o1=$8710

x2=$85,440, n2=43, and 2=$

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