Originally Posted by wbroun
Interesting stuff, Tom. Looks like the population has aged, at least a bit. The percentage of 50+ has risen, right?
OK, Wbroun, you found my weakness - I can't keep away from numbers ...
In my old survey, the percentage over 50 y.o. was 18% + 5% = 23%. If I remember correctly, my sample size was about 140, so I had 32 folks > 50 y.o..
At the present time, in your survey, the percentage over 50 y.o. is 16.8% + 5.4% + 6% + 0.6% = 28.8% on a sample size around 150, and you have ~44 folks > 50 y.o.
I don't feel like doing a full chi-squared analysis just as I am about to fall asleep, but I just did an order-of-magnitude estimate of significance in my head.
Based on the present numbers, I come up with a difference of about 1.4 standard deviations in the > 50 y.o. category between the two surveys - ie, a suggestive, but clearly inconclusive difference.
If someone eventually does a real statistics calculation on this data, please let us know the results.
... OK ... enough weenie stuff - sorry for the diversion - back to your regular programming...
Tom / PM