Re: Help interpreting data

Subject: Re: Help interpreting data
From: "Bonnie Granat" <bgranat -at- editors-writers -dot- info>
To: "TECHWR-L" <techwr-l -at- lists -dot- raycomm -dot- com>
Date: Thu, 24 Apr 2003 23:11:16 -0400

From: "Con & Yu" <dorun -at- m3 -dot- dion -dot- ne -dot- jp>

> 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

Hm. Let's see:

In 1980, City A had 95% of its population involved in agricultural production,
while 5% were involved in industrial production.

In 1990, City A had half of its population involved in agricultural production
and half involved with industrial production.

In the decade 1980-1990 there was a 45% decrease in the number of people
involved in agriculture, and a 45% increase in the number of people involved
in industrial production.

I don't understand the +95 either. Seems it should be +90---but wait a minute.
Now I see that the shifts in population were "almost" proportionate to the
increase or decrease in agricultural employment. Perhaps he meant "to the
increase AND decrease in agricultural employment." If so, +95 is close to the
actual change, so his figures for City A, at least, seem okay.

Bonnie Granat
Granat Editorial Services

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Help interpreting data: From: Con & Yu

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