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/sci/ - Science & Math

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1495508 No.1495508 [Reply] [Original]

/sci/, I have a math problem I'm stuck on.

I need to find the mean age of a city's population based off of census information. The census groups ages together in sections of 5 (10-14, 15-19, 20-24).

The problem asks me to find the average age of each group, then combine them to find the average age of the city. How do I find the average age of each group when it doesn't tell me specific ages?

>> No.1495529

>>1495508
(averages of age groups * number of people in that age ) / total people
i think

>> No.1495530

desperate bump

>> No.1495547

>>1495529
remember before dividing you have to add all the groups together by the way

>> No.1495551

don't know the answers, but ill happily bump
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>> No.1495554

>>1495529
I understand that, but specifically how do I find the average age for a group?
Like....

20-24 8,812 people

How would I find the average age for that?

>> No.1495563

>>1495554


>20-24 years old.................. 8,812 people
fix'd

>> No.1495564

>>1495554
(20+24)/2
It's the best you can do with the information given.

>> No.1495580

>>1495564
I guess you're right, teacher's actually a TA so I can't expect her to be perfect.

Thanks for the help man!

>> No.1495589

>>1495580
N/p & Hope this works out for you.