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Sampling (Probability sample (required for inferential statistics,…
Sampling
Sample size, depends on
larger sample, more power
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RDD
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Computerised phone books, advantages:
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Probability household
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- objectively designate person
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Several frames, improves:
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Calculate:
how often present in pop
how precise estimate
sample size compared to pop #
always report how wasn't included and whether they differentiate #
Recent innovations:
- recruiting ppl via internet via surveys
- recruiting ppl via household and giving access to internet
The bigger N is, the less the variance + the better the estimates
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