CFA Practice Question

There are 410 practice questions for this study session.

CFA Practice Question

If you are told a population has a mean of 25 and a variance of 0, what must you conclude?
A. Someone has made a mistake.
B. There is only one element in the population.
C. All the elements in the population are 25.

User Contributed Comments 5

User Comment
Daddykay eg consider a pop with elements: 25,25,25
Mean=75/3=25
Var=0
bashg Can it also be that there is only one element in the population. That element being 25
Mean 25/1 =25
var = 0
rana1970 But option B never say that one element is 25
JonClark Yes, B can be correct... But it's not the only possible population. The question asks, "what must you conclude?"
Shaan23 Thats not easy...it is but not at the same time...
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