A study found that in a random sample of 2000 high school cafeterias, 71% of them serve pizza daily.

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A study found that in a random sample of 2000 high school cafeterias, 71% of them serve pizza daily. In a random sample of 2000 colleges or universities. Cafeterias, 92% of them serve pizza daily. The researchers want to find a 99% confidence interval for the difference between the proportion of high school cafeterias that servevpizza daily, and the proportion of college university cafeterias that serve pizza daily. What is the point estimate in this situation

 
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