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Please type answer, can't see written answers well. Also PLEASE PROVIDE BELL SHAPED CURVE** That is the part...

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Basic Math

Please type answer, can't see written answerswell.

Also PLEASE PROVIDE BELL SHAPED CURVE** That isthe part I struggle with the most.

The airlines industry measures fuel efficiency by calculatinghow many miles one seat can travel, whether occupied or not, on onegallon of jet fuel. The following data show the fuel economy, inmiles per seat for 17 randomly selected flights on Delta andUnited. Assume the two population variances for fuel efficiency forthe two airline are equal.

Delta

65.80
81.40
58.90
73.60
53.20
49.80
68.30
61.40
73.10
67.60
72.20
61.00
52.70
71.40
44.90
55.90
86.70

United

82.10
58.80
60.00
57.90
45.20
54.30
68.40
52.00
59.60
63.10
67.40
73.30
77.20
58.00
81.10
88.50
63.00

a. Conduct a the 95% confidence interval estimate of thepopulation?

b. Perform a hypothesis test using ? = .05 to determineif the average fuel efficiency  differs between the twoairlines.

c. Determine the p-value and interpret theresults.

Answer & Explanation Solved by verified expert
4.1 Ratings (621 Votes)
a Conduct a the 95 confidence interval estimate of the population Solution Confidence interval for difference between two population means is given as below Confidence interval X1bar X2bar tsqrtSp21n11n2 Where Sp2 is pooled variance Sp2 n1 1S12 n2 1S22n1 n2 2 From given data we have Confidence level 95 X1bar 6458235 X2bar 6528824 S1 113526 S2 1175972 n1 17 n2 17 df n1 n2 2 17 17    See Answer
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