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DU Home » Latest Threads » Forums & Groups » Retired » Retired Forums » 2016 Postmortem (Forum) » Two new polls this aftern... » Reply #58

Response to Cosmic Kitten (Reply #43)

Tue Nov 3, 2015, 05:07 PM

58. You're making some incorrect assumptions on how blended samples work

The weightings are dependent on the population parameters. The caution in a blended sample is around how to identify the parts of the population that use which method. In other words, something like would weighing more of the mobile survey overcount the youth demographic for the population? That is what I mean about weights of response type. Blended samples generally do not include crosstabs by response type, outside of the % who responded in each manner, because it is considered one sample.

The survey and automated voice would "ask" the same questions so neither version would be deemed witch doctoring.

And, out of curiosity, what would refusal rate mean to you? If, theoretically, I said respondents finished the survey 10% of the time over the phone and 20% on mobile devices, how would you interpret that in terms of the validity of the poll?

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