Question 4 7 7 points a survey of 30 random shoppers

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Question 4 7 / 7 points
A survey of 30 random shoppers found a 95% confidence interval that shoppers will spend between $24.50 and $28.30. A second survey surveyed 25 random shoppers.
on 7 / poi A survey of 511 citizens found that 399 of them favor a new bill introduced by the city. We want to find a 95% confidence interval for the true proportion of the population who favor the bill. What is the lower limit of the interval? (Round to 3 decimal digits)
Question 6 6 / 6 points Compute a 95% confidence interval for the population mean, based on the sample numbers 21, 28, 33, 34, 25, 26, and 135. Which table do we use to find the margin of error? Hide Feedback
Question 7 6 / 6 points Compute a 95% confidence interval for the population mean, based on the sample numbers 21, 28, 33, 34, 25, 26, and 135. What is the Critical value? (Get 4 decimal digits). Question options: 2.5706 3.7074 2.4469
2.3646 Hide Feedback T with 6 degrees of freedom. It is a 2-tail test, so we split the .05 rejection region to two and use 0.025

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