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Now we have analyzed these box and whisker plots

• Can you guess what genre of film each box plot might represent?

• Can you work out the target audience of each film?

• Justify your decision using mathematical language

​Interpreting the box and whisker plots

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•Easily see lightest / heaviest and range

•The ‘box’ contains the middle 50% of people (the most ‘representative half’)

•The ‘whiskers’ show the lightest 25% and heaviest 25% of people (extremes)

​Comparing Groups 1

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1. ​​“Lightest girl lighter than lightest boy”

2. ​“Heaviest boy heavier than heaviest girl”

3. ​“Most representative half of girls generally lighter than most representative half of boys”

​Comparing Groups 2

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1. ​​“Lightest girl same as lightest boy”

2. ​“Heaviest boy same as heaviest girl”

3. ​“All of the most representative half of girls lighter than most representative half of boys”

4. ​“Three quarters of girls lighter than three quarter of boys”

​Some Terminology

Symmetrical Distribution

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​Some Terminology

​Positive skew: median closer to LQ than UQ

​Some Terminology

​Negative skew: median closer to UQ than LQ