Recently, a University Surveyed Recent Graduates of the English Department

Recently, a university surveyed recent graduates of the English Department for their starting
Salaries. Four hundred graduates returned the survey. The average salary was $55,000. The
Population standard deviation is known to be $2,500.
What is the 95% confidence interval for the mean salary of all graduates from the English
Department?

A) 52,500, $57,500
B) 54,755, $55,245
C) 54,988, $55,012
D) 54,600, $55,600