## Related questions with answers

Question

Which of the following would be most worrisome for the validity of the confidence interval you calculated in the previous exercise?

(a) The presence of a clear outlier in the raw data

(b) A mild skew in the stemplot of the raw data

(c) Not knowing the population standard deviation s

Solution

VerifiedStep 1

1 of 2In the previous exercise we used the $t$-procedures which does not require the knowledge of the population standard deviation $\sigma$.

A clear outlier influences the $t$-procedures more than mild skewness, thus answer (a) is the most worrisome.

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