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What were they growing, tomatoes in tubs on their balconies? Agricultural
populations do not live in cities.
Are these cities in separate countries, or regions? I would expect to see
something like
City A (in country A) 95/5, 50/50, +95
Meaning that during the decade when 45% of the *country's* employed
population moved from the agricultural to the industrial economy, the city's
population increased by 95%.
City B (in country B) 20/80, 50/50, -40
Meaning that during the decade when 30% of this country's employed
population moved from the industrial to the agricultural economy, the city's
population decreased by 40%.
You can certainly show a trend, or a general relationship, between economic
base and city growth or decline, but to try to show a *proportional* (or
more correctly, *inversely* proportional to the agricultural employment)
relationship is a statistical nightmare. For one thing, your agri/indust
employment ratios are relative to two different numbers (total employed
population at two different times) whereas the cities' growth/decline is
relative to a single number (1980 pop.).
And the figures you've been given are hardly proportional, witness Cities A
and D: almost the same change in employment ratio, but wildly different
growth figures.
Good luck with this one...
Stuart Rogers
Technical Communicator
Phoenix Geophysics Limited
Toronto, ON, Canada
+1 (416) 491-7340 x 325
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-----Original Message-----
From: bounce-techwr-l-88731 -at- lists -dot- raycomm -dot- com
[mailto:bounce-techwr-l-88731 -at- lists -dot- raycomm -dot- com] On Behalf Of Con & Yu
Sent: April 25, 2003 6:34 AM
To: TECHWR-L
Subject: Help interpreting data
I have been asked to to show that the changes from agricultural to
industrial economies resulted in shifts of population almost proportionately
to the increase or decrease in agricultural employment.
The data I was given are as follows:
the cities,
Agricultural/Industrial population (%) in 1980, Agricultural/Industrial
population (%) in 1990, their percentage changes in population from 1980 to
1990.
City A 95/5, 50/50, +95
City B 20/80, 50/50, -40
City C 80/20, 60/40, +20
City D 90/10, 10/90, +180
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