A College Placement Office Conducted a Survey of 100 Engineers

Multiple Choice

A college placement office conducted a survey of 100 engineers who had graduated from Stanford University.For these engineers,the mean salary was computed to be $72,000 with a standard deviation of $8,000.The percentage of these engineers who earn more than $96,000 or less than $48,000 is:

A) approximately 0%.
B) at least 5.6% (1/18 of the engineers) .
C) at most 5.6% (1/18 of the engineers) .
D) at most 11.1% (1/9 of the engineers) .