An outlier is a number in a data set that is much smaller or larger than the other numbers in the data set.

Transcript

Welcome to MooMooMath where we upload a new Math video everyday. In this video I would like to talk about what an outliers and how the affect measure of center.

An OUTLIER is when one data value is much greater

or much less than the rest of the data values in the

set.

An OUTLIER may affect a measure of center.

Determine how the outlier affects the median and the mean in the

following quiz scores.

55, 88, 90, 93, 94

Indentify the outlier yes it is 55

Next Find the median

Determine how the outlier affects the median by finding the median WITHOUT the outlier included.

MEDIAN = WITHOUT THE OUTLIER

Is as follows.

Did the median change? By how much? 1.5

Next, Calculate the mean

Determine how the outlier affects the mean by finding the mean

WITHOUT the outlier included.

MEAN = WITHOUT THE OUTLIER

Did the mean change? yes By how much? 7.25

Which measure of center changed MORE with the outlier?

The mean

WHEN THERE IS AN OUTLIER, IT IS BEST TO USE THE

MEDIAN

No outlier use mean when finding the measure of center

of comparing the measure of center

Thanks for watching MooMooMath uploads a new Math video everyday

|what is an outlier in math | what does outlier mean in math|

For more middle school videos see..

http://www.moomoomath.com/middle-school-math.html

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Please watch: "Study Skills Teacher's Secret Guide to your Best Grades"

https://www.youtube.com/watch?v=f3bsg8gaSbw

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Tagged under: Explainer video,evaluation,average,outlier,median,statistics,6th grade math,middle school math, outlier

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