Question 4 7 7 points a survey of 30 random shoppers

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.
Question options:
The second interval will be wider because the sample size is smaller and this creates
more 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 this
creates less uncertainty.
Question
5
0 / 7 points
A survey of 539 citizens found that 367 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?
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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).
Use the table here:
Distribution Tables
Question options:
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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