A fan survey cannot define the whole market
A fictional Swiss brand asks its social-media fans whether they love its excellent new service. Two hundred of one thousand valid invitees respond. Most favor the offer, and a focus group of enthusiastic customers agrees. The questionnaire combines delivery and packaging in one score and offers no option for people who have never used the service. Different language versions translate the frequency word differently. The report labels the result a representative national approval rate and recommends immediate expansion into every region. A separate small dataset of purchase values is two, three, three, four, and eighteen in the same fictional units. The research team needs to explain selection, wording, measurement, and distributional limits without pretending that all responses are false or that qualitative insight has no value. The decision remains how to reduce uncertainty about a wider, more diverse market.
1. Nenne vier konkrete methodische Probleme und eine passende Verbesserung.
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Fan self-selection limits generalization; praising wording is leading; a combined delivery-and-packaging score is double-barreled; nonusers need an appropriate option; multilingual meanings need pretesting. Define the target population and decision, use suitable sampling and neutral comparable questions, and report limits.
2. Berechne die einfache Rücklaufquote, den Median und das arithmetische Mittel der fünf Werte.
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Response rate is 200/1,000=20%. The ordered middle value is 3, while the sum 30 divided by 5 gives mean 6. The high value shifts the mean, showing why a distributional view can differ from a typical-value summary.