Question: The Soap and Detergent Association issued its fifth annual Clean
The Soap and Detergent Association issued its fifth annual Clean Hands Report Card survey for 2009. From the answers to a series of hygiene-related questions posed to American adults, it was found that 62% of 442 women washed their hands more than 10 times per day, while 37% of 446 men did the same. Find the 95% confidence interval for the difference in proportions of women and men that washed their hands more than 10 times a day.
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