28-4

magical cook · Posted: Thu Aug 30, 2007 8:52 am Post subject: 28-4

In a demographic study, the population and total income of a certain region were estimated from
other data, and both estimates had lower and upper limits. At the time of the estimates, was the
per capita income for the region greater than $16,500?

(1) The lower limit for the estimate of the population was 330,000 people.
(2) The lower limit for the estimate of the total income was $5,500,000,000.

kajcha · Posted: Thu Aug 30, 2007 10:21 am Post subject:

IMO C

Stmt 1 - Does not talk about Incomce NOT SUFF
Stmt 2 - Does not talk about population NOT SUFF

Together per capita income (lower limit) = 550000/330 = 16666.67

Greater than $16500.... SUFF

magical cook · Posted: Thu Aug 30, 2007 12:28 pm Post subject:

Unfortunately, answer is different.

Can anyone help us?

givemeanid · Posted: Thu Aug 30, 2007 12:57 pm Post subject:

You need the 'upper' limit for the population, not the 'lower' limit to calculate the lower end of the estimate. To minimize a/b, you need min a and max b. So, E.

kajcha · Posted: Thu Aug 30, 2007 1:19 pm Post subject: