Hi All,
Could someone help me with this brain teaser:
"How many babies were born yesterday in the US?"
How would the answer change if the question would ask for the same value on a monthly or a yearly basis?
Thanks a lot for your help!
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How can I consider the fact that the population is growing? Would that be correct if the population is growing 1% per year: #Population : life exp. + #Population x 0,01 ?
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Hi,
- US population: 320M
- Life expectation: 80y
- HP: Population equally spread for every age -> 0-1 years old: 320M/80 = 4M
- Baby born in a day: 4M/365 = 11k
Best,
Antonello
I would follow the following process:
- US population: 330M
- US population "per year": 330M / 80 years = 4.1 M / year Here you are making the hypothesis that the average life expectancy is 80 years
- Babies born in a day: 4.1 M / 365 = 11 k
Then you can state some aspects that cour estimation and add more complexity. For example:
- You could consider that natality is going down, adding a factor to decrease your number
- You can consider the natality distribution within a year: historically most of the brths are between July and September
Hope it helps,
Luca
Hi,
My logic would be as follows:
- There are about 300 mil. people living in the US
- Average family has 2 children (for simplicity) - in other words 1 child per person per life
- People live in average 70 years - lets asume, the amount of people in various age groups is equally split (i.e. same amount of people in age 1, same in age 31, same in 51 etc.)
==> 300 / 70 / 1 = 4 mil. children per year
==> 4 mil. / 365 = 11 tis. children per day
if you check it with the real statistics - its actually a very good yearly guess
Hi all,
I was wondering if I am applying to a consulting firm within the health care sector and they ask me "How many babies are born every year?", could I give the approach:
- US population: 320M
- Life expectation: 80y
- Population equally spread for every age -> 0-1 years old: 320M/80 = 4M babies per year
Or is there another approach of how many babies are born in each hospital every year times the number of hospitals in the country?
Hello!
I would go with:
- Total population of the US: ~330 M people
- Assume that people are equally distributed in the population pyramid from 0 to 90 years old. This makes 9 buckets of people (e.g., from 0 to 10, from 10 to 20, etc.) >> 330/9 = 36 M people in the 0-10 bucket.
- Since natality is going down and you know the pyramid is not evenly distributed, you can go from those 36 M people from 0-10 to 30 M people.
- Dividing 30 M people / 10 years, you obtain 3M people per year being born yearly in the last 10 years.
- 3M people / 365 days you get approximately 8 K babies being born daily.
Hope it helps!
Cheers!
Clara
