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. Asurvey ot 700 customers indicates that ?3% own cars. a} What is the estimated standard deviation of the sampling distribution of the proportion? in} How large would the estimated standard deviation have been if he had surveyed on y 175 customers (assuming the proportion is about the same)? a} The estimated standard deviation ot the sampling distn' bution of the proportion is (Round to four decimal places as needed)