ged_math_lesson_13_ec_final.pdf

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Lesson 13: Mean, Median, Mode, and Range D. Legault, Minnesota Literacy Council, 2014 3 Mathematical Reasoning Lesson 13 Activity 2: M,M,M, and Range Computation Time: 20-25 Minutes 1) Example A: Ask five students how many children they have, and write all the numbers on the board. Now you can figure out together: Mean: Take all the numbers, add together, and divide by 5, the number of students surveyed. That gives you the average. Mode: Are there two students who have the same number of children (could be zero)? If yes, that’s the mode. If not, there is no mode. Median: Put all five numbers in a row from lowest to greatest. The one in the middle is the median. Range: Take the difference of the greatest minus the lowest and that is the range. 2) Example B: Now ask another student so you have six total. Figure out the mean, the mode (if there is one), and the range. What is the median? It’s halfway between the two middle numbers. (If those are 2 and 3, the median in 2.5, for example) 3) Give students Handout 13.1 for more examples. 4) Do Worksheet 13.2 for practice. Do the first one together. An alternative to the worksheet is to have groups of 3-4 students use a deck of cards. Together they pick 4-5 cards and compute the M,M,M and range. Every group would have different answers so the teacher would need to circulate to check.
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