SOLUTION: Assume all samples are simple random samples. In a poll, 1025 randomly selected adults were surveyed and 29% said they use internet for shopping at least a few times a year. Fin

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Question 1058521: Assume all samples are simple random samples.
In a poll, 1025 randomly selected adults were surveyed and 29% said they use internet for shopping at least a few times a year.
Find a point estimate of the percentage of adults who use the internet for shopping.
Find a 99% confidence interval estimate of the percentage of adults who use internet for shopping
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The CI interval width is z(0.995) sqrt{ (p*(1-p))/n}
=2.576*sqrt{(.29*.71)/1025}
=2.576*0.0142
=0.0365 (rounded at end)
The interval is (0.2535,0.3265)