# Interpret Center and Spread of Data

Videos and lessons to help High School students learn how to interpret differences in shape, center, and spread in the context of the data sets, accounting for possible effects of extreme data points (outliers).

Common Core: HSS-ID.A.3

S.ID.3 - Interpret the difference in shape, center, and spread to analyze data.

HS Math Interpreting Differences in Shape Center and Spread.

HS Math Interpreting Differences in Shape Center and Spread.

Describing Histograms
A look at how to describe histograms based on center, spread, shape and outlier.
Some important keynotes:
When the data is skewed right, the mean will be larger than the median.
When the data is skewed left, the mean will be smaller than the median.
When the data is symmetrical, the mean and median will be about the same.
For bimodal data, you probably want to look at two separate sets of data rather than the one you're currently looking at.
Adjusting the class width may make it easier for you to see which measure of central tendency to use.
The only measure of spread we've talked about so far in class is range. This is found by taking the maximum and subtracting the minimum. It helps give us an idea of how spread out the data is.

Maths Tutorial: Describing Statistical Distributions (Part 1 of 2)
How to describe histograms, boxplots, stemplots, and dotplots talking about shape, outliers, centre and spread.

Maths Tutorial: Describing Statistical Distributions (Part 2 of 2)
How to describe outliers and spread on histograms, boxplots, stemplots, and dotplots.

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