What is the Missing Mean in a Sample of Size 5?

[sci0x]

Exam is in the next 30 mins so please reply ASAP.
I just need help with this question.

For a sample of size 5, x1 - mean = -5, x2 - mean = 9, x3 - mean = -7, x4 - mean = -2 and x5 - mean = 5
What is standard deviation... answer is 6.782 by squaring all the answers, dividing by n-1 and finding square root.

However, what is the mean of the sample. Is this possible to get missing both x1, x2, x3, x4, x5 and also missing the mean?

 

[mathman]

However, what is the mean of the sample. Is this possible to get missing both x1, x2, x3, x4, x5 and also missing the mean?

You cannot infer the mean from the information given. NO!