正解:B
Themedianis the middle value in a sorted list of numbers. The steps to determine the median are:
* Sort the numbers in ascending order:3, 5, 6, 7, 9
* Find the middle value:Since there arefivenumbers, the middle value is the third one:Median = 6
* Option A (5):Incorrect. 5 is not the middle value.
* Option B (6):Correct.6 is the middle value in the sorted list.
* Option C (7):Incorrect. 7 is not the middle value.
* Option D (9):Incorrect. 9 is the highest value, not the median.
Reference:The CompTIA Data+ (DA0-001) Study Guide defines the median as the middle value when data is arranged in ascending order.