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<v Speaker>Hello students.</v>

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So this is 1F, problem 1F,

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which is the last problem from this set.

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And in this one, what we are being asked is

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which measure,

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the standard deviation

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or the interquartile range is a better measure

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of dispersion and justify our answer.

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So because there are outliers, the best measure

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of dispersion is going to be our standard deviation.

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So because no outliers exist

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in our dataset,

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which we just calculated,

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best measure of dispersion

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is going to be standard deviation.

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And we have already calculated

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that before and that is what? 29.

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So now I think in your mind, hopefully the next question is

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so what if we do have outliers?

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What will we do then?

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Okay, in a little while, I'm going to answer that question

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and you will learn what to do when we do have outliers.