A Study Was Conducted to Determine If the Salaries of Librarians

Multiple Choice

A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. Asample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with astandard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100.Construct a 95% confidence interval for $$\mu _ { 1 } - \mu _ { 2 }$$

A) (-3125, 325)
B) (-2054, 238)
C) (-2871, 567)
D) (-4081, 597)