Hi John,
it wasn´t my intention to falsify their results;-) But the request
didn´t come from HOT itself, so I wanted to check if anybody knew about
it. I have never given my email or contact data to this university. They
are registered as a HOT user and send me a message.
Regards
Katja
Am 11/06/15 um 19:42 schrieb john whelan:
If you've been selected for a random sample, and it is a true random
sample, passing the link to anyone else effectively contaminates the
sample.
Random sampling is a mathematical technique that is used in surveys to
draw conclusions based on a small sample that can be extrapolated to a
larger population.
By passing the link on the responses will be bias towards more
experienced mappers who read the list, so to preserve the methodology
the survey should only be completed by the person it was sent to.
There was a discussion earlier in the list with a comment from Pierre
saying it would be useful to run slightly different surveys with
questions aimed at new mappers, mappers with some experience and very
experienced mappers. I don't know if this survey is of that type.
Cheerio John
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