In a sample of 1000 randomly selected consumers who had opportunities to send in a rebate claim form after purchasing a product, 380 of these people said they never did so. Reasons cited for their behavior included too many steps in the process, amount too small, missed deadline, fear of being placed on a mailing list, lost receipt, and doubts about receiving the money. What is the sample proportion? (Round your answer to two decimal places.)   What is the standard deviation? (Round your answer to four decimal places.)   Calculate an 95% confidence interval for the true proportion of such consumers who never apply for a rebate. (Round your answer to three decimal places.)     ,      watts

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