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 investigatefurther. 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:Summary statistics:Column nMeanMedianStd. dev.MinМаxQ1Q3Airfare46 464.15515459.50126.4925233790378.37522.44Two-tail probabilityOne-tail probability0.200.100.050.020.010.100.050.0250.010.005Table Tdfdf251.3161.7082.0602.4852.78725261.3151.7062.0562.4792.77926271.3141.7032.0522.4732.77127281.3131.7012.0482.4672.76328291.3111.6992.0452.4622.75629301.3101.6972.0422.4572.75030321.3091.6942.0372.4492.73832351.3061.6902.0302.4382.72535401.3031.6842.0212.4232.70440451.3011.6792.0142.4122.69045• With 95% confidence, we estimate the mean airfare for flights out of Cincinnati is between $• 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?and $(Round the limits of your interval to 4 decimal places.)The interval does not support this claim because an airfare of $376 does not fall inside the interval.OThe interval supports the claim because the entire interval is greater than $376.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.• 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?the confidence intervalan interval based on the Empirical Rule or Chebyshev's Rule (depending on the shape of the data)• Suppose the sample selected was taken so that the 46 most expensive flights from CVG were selected. Which assumption has been violated?quantitative datarandom samplenormality

As per our guidelines, we are allowed to answer three sub-parts only. Thanks a) The provided…

• With 95% confidence, we estimate the mean airfare for flights out of Cincinnati is between S • 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? and $ - (Round the limits of your interval to 4 decimal places.) 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. 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. • 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? the confidence interval an interval based on the Empirical Rule or Chebyshev's Rule (depending on the shape of the data)

• With 95% confidence, we estimate the mean airfare for flights out of Cincinnati is between S • 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? and $ - (Round the limits of your interval to 4 decimal places.) 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. 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. • 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? the confidence interval an interval based on the Empirical Rule or Chebyshev's Rule (depending on the shape of the data)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

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:
Summary statistics:
Column n
Mean
Median
Std. dev.
Min
Маx
Q1
Q3
Airfare
46 464.15515
459.50
126.4925
233
790
378.37
522.44
Two-tail probability
One-tail probability
0.20
0.10
0.05
0.02
0.01
0.10
0.05
0.025
0.01
0.005
Table T
df
df
25
1.316
1.708
2.060
2.485
2.787
25
26
1.315
1.706
2.056
2.479
2.779
26
27
1.314
1.703
2.052
2.473
2.771
27
28
1.313
1.701
2.048
2.467
2.763
28
29
1.311
1.699
2.045
2.462
2.756
29
30
1.310
1.697
2.042
2.457
2.750
30
32
1.309
1.694
2.037
2.449
2.738
32
35
1.306
1.690
2.030
2.438
2.725
35
40
1.303
1.684
2.021
2.423
2.704
40
45
1.301
1.679
2.014
2.412
2.690
45
• With 95% confidence, we estimate the mean airfare for flights out of Cincinnati is between $
• 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?
and $
(Round the limits of your interval to 4 decimal places.)
The interval does not support this claim because an airfare of $376 does not fall inside the interval.
OThe interval supports the claim because the entire interval is greater than $376.
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.
• 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?
the confidence interval
an interval based on the Empirical Rule or Chebyshev's Rule (depending on the shape of the data)
• Suppose the sample selected was taken so that the 46 most expensive flights from CVG were selected. Which assumption has been violated?
quantitative data
random sample
normality

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