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Manual Event (Session ID,DateTime,Event) = 76u083ljci6j3h3cfe7c1nc38l 20210805125008 /communities/determine-sample-size-for-unknown-population/

Determine sample size for unknown population?

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Discussion thread: Services for People with Disabilities
Woody Miu
5 October 2019
Determine sample size for unknown population?

Hi everyone! Is there any standard/common formula for determining sample size for unknown population? We are developing a project targeted at disabled women with mental health in HONG KONG, but seems that the population data is not avalible. Thank you!

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Jason Jiang
21 February 2020

https://www.statisticshowto.datasciencecentral.com/probability-and-statistics/find-sample-size/#CI1

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Woody Miu
7 November 2019

Thank you so much for your reply!

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Dr. MEL
29 October 2019

Just because the number of women, the number of people with disability, and the number of people with mental health problems are all large, the number of women with disability and mental health problems should also be large. So, a simple guess is just the multiplicative product of three proportions, say (.5)(.05)(.05) = .00125. If the overall adult population is 5 million, then the target population will be 6,250.

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