Mathematics
Mathematics, 12.11.2019 04:31, codyczajka

Amarket researcher for a provider of music player accessories wants to know the proportion of customers who own cars to assess the market for a new car charger. a survey of 400400 customers indicates that 7373​% own cars. ​a) what is the estimated standard deviation of the sampling distribution of the​ proportion? ​b) how large would the estimated standard deviation have been if he had surveyed only 100100 customers​ (assuming the proportion is about the​ same)?

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