by J J Cohen
If you enjoyed this little work of art -- and even if you didn't -- my son Alex requests your assistance with a mathematics project. Having been required to design a survey that will yield a numerical spread, he must now obtain (1) a biased sample [hence ITM, his "voluntary response, convenience sample"] and (2) an unbiased "systematic random sample" [we will be at a grocery store asking every fifth person his query ... and yes I know the demographics of this area will likewise skew the result, but the kid is in sixth grade, an age at which I was trying to figure out how to add fractions like one third to three quarters without making my head explode, so I think I will refrain from challenging him on local median incomes versus national and regional averages] [for the time being].
Please take his survey at right, and please be truthful so that he can with some confidence do his medians and means and whatever else he needs. His future as a statistician hangs in the balance as he attempts to answer questions like "Identify and explain which measure of central tendency best represents the data from each survey."
And yes, I promise a return to medieval posts tomorrow.
[EDIT 9/15: We closed the poll when we got to the number Alex needed, and on his behalf I say THANK YOU to all who participated. Lesson learned: it takes a loooong time to train oneself as a medievalist, since 12 years was the most popular category ... and as commenters pointed out, even that was cutting it short].