Back-to-back stem-and-leaf plot: Class A and Class B

An example figure from the Stem-and-Leaf Plot Generator.

A back-to-back stem-and-leaf plot titled Push-ups in one minute, with Class A’s leaves running left and Class B’s running right from shared stems 2 to 5 — A back-to-back stem-and-leaf plot titled Push-ups in one minute, comparing Class A and Class B. The stems 2, 3, 4 and 5 run down the middle between two lines, with Class A’s leaves running left from them and Class B’s running right, each in order outward from the stem and headed with its class’s name. The key reads 4 | 2 | 1 means 24 for Class A and 21 for Class B. Students compare the two classes’ medians and ranges.

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Answer key

Class A: n 12 · Min 24 · Max 51 · Range 27 · Median 34.5 · Mode 33 · Q1 30 · Q3 41
Class B: n 13 · Min 21 · Max 58 · Range 37 · Median 44 · Mode none · Q1 32 · Q3 50.5

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