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Question 47 / 7 pointsA survey of 30 random shoppers found a 95% confidence interval that shoppers willspend between $24.50 and $28.30.A second survey surveyed 25 random shoppers.Question options:The second interval will be wider because the sample size is smaller and this createsmore uncertainty.The second interval will be wider because it is likely that there are more outliers.The second interval will be narrower because it is likely that there are less outliers.The second interval will be narrower because the sample size is smaller and thiscreates less uncertainty.
Question50 / 7 pointsA survey of 539 citizens found that 367 of them favor a new bill introduced by thecity.We want to find a 95% confidence interval for the true proportion of the populationwho favor the bill.
What is the lower limit of the interval? (Round to 3 decimal digits)
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Question 66 / 6 pointsCompute a 95% confidence interval for the population mean, based on the samplenumbers 21, 28, 33, 34, 25, 26, and 135.Which table do we use to find the margin of error?Hide Feedback
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Question 76 / 6 pointsCompute a 95% confidence interval for the population mean, based on the samplenumbers 21, 28, 33, 34, 25, 26, and 135.What is the Critical value? (Get 4 decimal digits).Use the table here:Distribution TablesQuestion options:
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Hide FeedbackT with 6 degrees of freedom. It is a 2-tail test, so we split the .05 rejection region to two and use0.025