Math Arguments

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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Item 343

Reported Ages

Sayeth Mr Honner:


Patrick Honner: Here’s a fun little data set from a statistics textbook I’m reading.



These are the distributions of last digits of ages reported on the 1880 and 1970 US Censuses. At least two interesting questions come to mind, one with a seemingly easy answer.


What do you think his two questions are?
What other questions did you have?
What would the graph look like if we asked people for the ages of their parents?


What other mathematical aspects of this caught your attention? What do you wonder about the situation?

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Notice, Wonder
Mr. Honner
STATS

Source: Mr. Honner
last_digit_of_age_-_1880_vs_1970
More Information:
Noticing and wondering is a tool to help students:
- Understand the story, the quantities, and the relationships in the problem.
- Understand what the problem is asking and what the answer will look like. Have some ideas to begin to solve the problem.
More Here at NCTM


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