Outliers

<a href="https://www.prepswift.com/quizzes/quiz/prepswift-outliers" target="_blank">Outliers Exercise</a>Imagine you have $10$ middle-class people in a room. Their salaries are all roughly equal. Then Bill Gates enters the room.  That's an Outlier. Bill Gates is an outlier. Outliers are datapoints that differ significantly from most (or all) of the other data. The Effects Outliers Have on Data <ul> <li>The average is considerably affected. For example, the average of the first $10$ numbers is $5.5$. If we add an outlier to the data, say $1$,$000$, the average is now approximately $95.9$.</li> <li>The median is NOT affected (or only slightly so). For example, the median of the first $10$ integers is $5.5$. If we add an ourlier to the data, say $1$,$000$, the median is now $6$, just a minor change.</li> <li>The range considerably affected. For example, the range of the first $10$ integers is $9$. If we add the outlier $1$,$000$ to the mix, the range is now $999$. </li> <li>The interquartile range is NOT affected. See the mountain entry (upcoming) on the interquartile range to figure out why.</li> </ul>