Construct a 99% confidence interval for the difference between the mean annual salaries of registered nurses in New Jersey and Delaware using the data from Exercise 28.
Construct the indicated confidence interval for μ1 - μ2.
Exercise 28
Is the difference between the mean annual salaries of registered nurses in New Jersey and Delaware equal to $10,000? To decide, you select a random sample of registered nurses from each state. The results of each survey are shown in the figure. Assume the population standard deviations are σ1 = $8345 and σ2 = $7620. At α = 0.01, what should you conclude? |

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