How can I ensure random sampling for customer surveys when the sampling frame is unavailable but need to run a regression?

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Hamid Ghorbani

Hi, please have a look at

1)https://www.researchgate.net/post/What-is-the-best-method-to-obtain-a-representative-sample-when-there-is-no-sampling-frame

2)Article Alternatives to full listing for second stage sampling: Meth...

hope these help,

Yours,

Hamid

Mohammad Abdullah Heel Kafi

Hi,

You can try this,

SD for the Average = SQRT[(SD1^2 + SD2^2 + SD3^2) / 3]

Thanks.