Could TDCs problems be bad fact finding?
I was recently forwarded a press release which appears to have come from Thanet District Council (TDC) announcing that Operation Clean Sweep was universally popular. While I have no fixed opinion on the subject I do object to the way in which the data was collected.
Why do I object to this survey so much?
1. This press release came out at the begining of November but the survey runs until the 18th of December. Rule number one in statistical sampling never tell the target population what everyone else has been saying if you want them to tell you their opinion and not shift it to fit with the "popular" view of things. This press release undermines the value of the final findings by biasing the whole survey towards the early results.
2. This data collected came from 400 out of about 125,000 people a statistically insignificant sample size. That is just 0.32% of the population of Thanet. A bigger number than that vote BNP and we do not consider them a significant reflection of the area's opinion.
3. Thanet Community Safety Partnership spent a week getting 400 people's opinion from sites around Thanet that ammounts to 80 a day which must be taken to roughly equal 80 per point in Thanet visited. again this sample rate is too low. Furthermore these people were being asked if they supported or liked something that the question asker was part of promoting. Hardly a nutuural assesment.
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