Open Question: statistics problem? HELP!!!?

10 October 2008, 7:24 am

A survey of 400 randomly sampled shoppers at a supermarket in Sydney found that 50 buy Cooldoor toothpaste. Let p be proportion of people of all shoppers at the supermarket who buy this brand of toothpaste. Given this sample data, what is an (approximate) 99% confidence interval for p? 1.... 2........ read more

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