Trego's Mountain Ear

"Serving North Lincoln County"

Tag: Median age

  • When the official data isn’t good data

    As I was retiring, the American Community Survey(ACS) was replacing the long-form Census questionnaire.  There is merit to the argument that a survey can provide data that is as good as a form that one out of six people fill out – both are, after all, actually surveys.  Still, as a rural sociologist whose primary duties were rural demography, I wasn’t comfortable with the American Community Survey results – the sampling size was too small.

    Now, I can access data that compiles five years worth of estimates – so here is some data on Rexford, Eureka, Fortine and Trego, by zip code, in two separate five-year conglomerates:

    2012-2016Rexford
    59930
    Eureka
    59917
    Fortine
    59918
    Trego
    59934
    Total Population5664,425584562
    5 to 9212823452
    10 to 14353052249
    Median (Average) Age58.043.650.749.2
    Per capita income$22,377$18,799$21,203$25,999
    2015-2019Rexford
    59930
    Eureka
    59917
    Fortine
    59918
    Trego
    59934
    Total Population6584,769747476
    5 to 953212
    10 to 14502163520
    Median (Average) Age56.046.847.260.4
    Per capita income$13,438$22,867$28,753$26,671

    The American Community Survey is a well-conducted survey.  The data is correct, in both cases, within the limits of the survey.  The small samples, however, can create some large swings and make the data less useful.  I have been looking forward to reviewing the Trego data since I was selected to return the ACS survey.  Trego’s median age went up 11 years.  The population dropped by 15%.  The youth population plunged.  Meanwhile Fortine incomes increased by 36%, as Rexford plunged into the depths of poverty.  All the survey data is correct – but sampling bias, due to the small number of participants, has given us data we can’t use.

    I still prefer the old, time-consuming long form results over the ACS.