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IFoA_CAA_M0 Exam - Topic 9 Question 92 Discussion

Actual exam question for IFoA's IFoA_CAA_M0 exam
Question #: 92
Topic #: 9
[All IFoA_CAA_M0 Questions]

For random variable X, use the following statistics to calculate its coefficient of skewness based on central moments.

E(X) = 3.940

E(X2) = 21.466

skew(X) = E[(X - )3] = 6.008

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Suggested Answer: C

by Paola at Nov 22, 2025, 08:33 PM

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Sherita
8 days ago
Are we sure about those numbers? Seems off.
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Jacquline
13 days ago
Totally agree with C! Looks right to me.
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Verlene
18 days ago
Wait, how do we even calculate that?
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Jackie
24 days ago
I think the answer is C) 0.415.
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Curtis
29 days ago
The skewness formula is based on central moments, right?
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Albert
1 month ago
Wait, is this a trick question? I feel like the answer should be something really weird, like -0.415 or something. I'll go with A) -0.415 just to be different.
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Luz
1 month ago
Haha, this question is making my head spin! I'm just going to guess C) 0.415 and hope for the best.
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Glendora
1 month ago
Hmm, I'm not sure about this one. The formula looks a bit complex, but I'm going to go with B) 0.060 just to be safe.
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Kendra
2 months ago
I feel like I should be able to calculate this, but I keep mixing up the formulas for skewness and kurtosis.
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Tuyet
2 months ago
I think the coefficient of skewness is supposed to indicate the asymmetry, but I'm confused about how to interpret the values.
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Dottie
2 months ago
Phew, that was tricky. I'm pretty confident I calculated the coefficient of skewness right, but I'll double-check my work before submitting the answer.
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Glory
2 months ago
I think I've got it! The coefficient of skewness is calculated as skew(X) / sqrt(E(X^2) - E(X)^2)^3. Let me work through the numbers...
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Kathrine
3 months ago
This seems similar to a practice question we did on skewness, but I can't recall the exact formula we used.
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Lewis
3 months ago
I think the answer is D) 0.768. The formula seems a bit tricky, but I'm pretty sure that's the right way to calculate the coefficient of skewness.
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Inocencia
3 months ago
Wait, which option is the right answer? I'm not sure I'm doing this correctly.
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Lavonne
3 months ago
I remember we calculated skewness using central moments in class, but I'm not sure how to apply it here.
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Brandee
3 months ago
Okay, I've got the stats - E(X), E(X^2), and the skewness value. Now I just need to plug those into the formula and solve.
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Olen
4 months ago
Hmm, this looks like a stats problem. I'll need to remember the formula for coefficient of skewness using central moments.
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Carmela
2 months ago
I think the formula is crucial here.
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