A special list
Considering the following conversation, what is the mean of Alice's numbers?
Alice: "I have a special list of numbers. It has a standard deviation of 0."
Bob: "I wonder what the mean of the numbers is."
Alice: "All I can say is that it has a median of 5."
Bob: "Now I know the mean of the numbers!"
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1 solution
SD = 0 ==> the numbers don't deviate from each other at all ==> the numbers are all the same.
If the median is 5, the every number in her list is also 5. Mean should also be 5.