Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Representing Data - Problem 4

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Representing Data - Problem 3

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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We can order data from smallest to greatest and find the median, which is right in the middle. The median creates two halves- if we do the median of each half, we'll find the Lower Quartile (or Q1) and the Upper Quartile (Q3.) The median is like quartile 2. Together with the maximum and minimum value, the Q1, median, and Q3 are called a "5- number summary" of a data set. A box and whisker plot represents these numbers. Create a numerical horizontal axis, with marks above it for each of the 5 numbers. Create a box connecting Q1 with Q3 and a vertical line at the median, and "whisker" lines that extend to the max and minimum in each direction. This type of display shows us the shape of a data set, including extreme values.

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