In an experiment with 15 observations on \( \mathrm{x} \), the foll...

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In an experiment with 15 observations on \( \mathrm{x} \), the following results were available
\( \mathrm{P} \)
\[
\sum x^{2}=2830, \sum x=170
\]
W
- One observation that was 20, we found to be wrong and was replaced by the correct value 30 . Then, - the corrected variance is
(A) \( 78.00 \)
(B) \( 188.66 \)
(C) \( 177.33 \)
(D) \( 8.33 \)
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