SOLUTION: In a survey, 376 out of 1,078 US adults said they drink at least 4 cups of coffee a day. Find a point estimate (P) for the population proportion of US adults who drink at least 4 c
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-> SOLUTION: In a survey, 376 out of 1,078 US adults said they drink at least 4 cups of coffee a day. Find a point estimate (P) for the population proportion of US adults who drink at least 4 c
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Question 1159756: In a survey, 376 out of 1,078 US adults said they drink at least 4 cups of coffee a day. Find a point estimate (P) for the population proportion of US adults who drink at least 4 cups of coffee a day, then construct a 99% confidence interval for the proportion of adults who drink at least 4 cups of coffee a day. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Point estimate is just the proportion given or 376/1078=0.3488
99% CI is half-interval is z(0.995)* SE, or 2.576* sqrt (0.3488*0.6512/1078)
=0.0374
add and subtract that to mean
99% CI is (0.3114, 0.3862)
