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Box and Whisker

Box and Whisker. Algebra I. Basic Vocabulary. Mean – sum of data divided by the total number of data. Median – the middle number of a set of data in numerical order. Mode – the most occurring number in a set of data.

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Box and Whisker

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  1. Box and Whisker Algebra I

  2. Basic Vocabulary • Mean – sum of data divided by the total number of data. • Median – the middle number of a set of data in numerical order. • Mode – the most occurring number in a set of data. • Range – the difference between the greatest and lowest numbers in a set of data

  3. Box and Whisker Plot • Organize data in numerical order. • Find the median. • Find the median of the data between the median and the lower/upper extreme.

  4. Parts of a Box and Whisker • Lower extreme – the lowest number on a box and whisker plot. • Upper extreme – the highest number on a box and whisker plot. • Median – the middle number on the box and whisker plot. • Upper quartile – the median of the numbers between the median and the upper extreme. • Lower quartile – the median of the numbers between the median and the lower extreme.

  5. Example 35,35,37,40,43,56,58,58,60 • Organize data in numerical order. • Find the median (this will divide the data). • Find the median of the upper and lower sets of data.

  6. Interquartile Range • The difference between the upper quartile and the lower quartile.

  7. Outliers on a Box and Whisker Plot • Data that is outside of the box and whisker plot. • Shown on a graph as a point separate from the box and whisker plot.

  8. Quartiles • Each quartile represents 25% of the data. • The interquartile represents the middle 50% of the data.

  9. Comparing Box and Whisker • Which brand has the greater median? • Which brand has the least range?

  10. Comparing Box and Whisker • What similarities do you see between the two tests? • What differences do you see between the two tests?

  11. Comparing Box and Whisker • Find some comparisons between the different graphs.

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