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X is a random variable with expected value E(X).
Identify which of the following isnot a valid method for calculating the variance of X.
Suggested Answer: D
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12 comments · newest first
LI
Ling
11 months ago
B is a legit method, just saying!
OS
Osvaldo
12 months ago
Variance = E(X²) - [E(X)]², right?
DE
Denny
12 months ago
Wait, how is D even an option? Seems off.
JE
Jennie
12 months ago
Totally agree, D doesn't make sense.
GE
Germaine
1 year ago
Option D is definitely not valid for variance.
TR
Trevor
1 year ago
I'm pretty confident that E(X^2) - E(X) is not correct for variance, so I would go with option D as the answer.
AR
Art
1 year ago
I think the second moment minus the square of the first moment is a standard method for calculating variance, so that should be valid.
CH
Charolette
1 year ago
I remember that variance is related to the expected value, but I'm not sure if option D is valid.
ED
Edgar
1 year ago
I practiced a similar question where we had to identify incorrect formulas for variance, and I feel like option A might be tricky too.
RO
Ronny
1 year ago
I think the key here is to focus on the specific wording of the question - it's asking about a technology that reduces database transaction logs response time. Based on that, I'm leaning towards Adaptive Flash Cache as the most likely answer.
PE
Peggie
1 year ago
Based on my understanding, the ODI JEE components should be deployed on the Administration Server, as that's the central management point for the WebLogic domain.
AS
Ashlyn
1 year ago
Ah, this is a good one. I'll need to consider the pros and cons of each option before making a decision.