Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $25,000. 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) 3,496.80, $35,039.20
B) 34,608, $35,392
C) 34,671, $35,329
D) 34,960.80, $3,539.20
E) 34,800, $35,200

Question

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The Answer of Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $25,000. 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) 3,496.80, $35,039.20
B) 34,608, $35,392
C) 34,671, $35,329
D) 34,960.80, $3,539.20
E) 34,800, $35,200

Recently, a University Surveyed Recent Graduates of the English Department