A recent article published by the Wall Street Journal said the Cincinnati airport had the most expensive airfares among the largest airports in the US. While they had some statistics to support this statement, a statistician decided to investigate further. A sample of 46 flights originating in Cincinnati was selected, and the round-trip airfare for each flight was recorded. The sample data is summarized in the StatCrunch output below: With 98% confidence, we estimate the mean airfare for flights out of Cincinnati is between $ and $. (Round the limits of your interval to 4 decimal places.) The mean airfare nationwide was reported as $376 for a round-trip ticket. Does the interval found above support the claim that Cincinnati has airfares which are more expensive than other airports in the US? The interval does not support the claim because the entire interval is not above $376. We can't make this conclusion based on a confidence interval. The interval does not support this claim because an airfare of $376 does not fall inside the interval. The interval supports the claim because the entire interval is greater than $376. You need to schedule a flight for the summer. If you want to estimate the cost of your flight, which interval would be most appropriate for estimating the cost? an interval based on the Empirical Rule or Chebyshev's Rule (depending on the shape of the data) the confidence interval Suppose the sample selected was taken so that the 46 most expensive flights from CVG were selected. Which assumption has been violated? normality random sample quantitative data
A recent article published by the Wall Street Journal said the Cincinnati airport had the most expensive airfares among the largest airports in the US. While they had some statistics to support this statement, a statistician decided to investigate further. A sample of 46 flights originating in Cincinnati was selected, and the round-trip airfare for each flight was recorded. The sample data is summarized in the StatCrunch output below: With 98% confidence, we estimate the mean airfare for flights out of Cincinnati is between $ and $. (Round the limits of your interval to 4 decimal places.) The mean airfare nationwide was reported as $376 for a round-trip ticket. Does the interval found above support the claim that Cincinnati has airfares which are more expensive than other airports in the US? The interval does not support the claim because the entire interval is not above $376. We can't make this conclusion based on a confidence interval. The interval does not support this claim because an airfare of $376 does not fall inside the interval. The interval supports the claim because the entire interval is greater than $376. You need to schedule a flight for the summer. If you want to estimate the cost of your flight, which interval would be most appropriate for estimating the cost? an interval based on the Empirical Rule or Chebyshev's Rule (depending on the shape of the data) the confidence interval Suppose the sample selected was taken so that the 46 most expensive flights from CVG were selected. Which assumption has been violated? normality random sample quantitative data
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A recent article published by the Wall Street Journal said the Cincinnati airport had the most expensive airfares among the largest airports in the US. While they had some statistics to support this statement, a statistician decided to investigate further. A sample of 46 flights originating in Cincinnati was selected, and the round-trip airfare for each flight was recorded. The sample data is summarized in the StatCrunch output below:
- With 98% confidence, we estimate the
mean airfare for flights out of Cincinnati is between $ and $. (Round the limits of your interval to 4 decimal places.) - The mean airfare nationwide was reported as $376 for a round-trip ticket. Does the interval found above support the claim that Cincinnati has airfares which are more expensive than other airports in the US?
- The interval does not support the claim because the entire interval is not above $376.
- We can't make this conclusion based on a confidence interval.
- The interval does not support this claim because an airfare of $376 does not fall inside the interval.
- The interval supports the claim because the entire interval is greater than $376.
- You need to schedule a flight for the summer. If you want to estimate the cost of your flight, which interval would be most appropriate for estimating the cost?
- an interval based on the
Empirical Rule or Chebyshev's Rule (depending on the shape of the data) - the confidence interval
- an interval based on the
- Suppose the sample selected was taken so that the 46 most expensive flights from CVG were selected. Which assumption has been violated?
- normality
- random sample
- quantitative data
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