1. Table C10-1 shows the results of a survey that Omega hired a marketing firm t
ID: 3369435 • Letter: 1
Question
1. Table C10-1 shows the results of a survey that Omega hired a marketing firm to conduct to compare Omega with competing airlines. The survey was given to passengers of 4 different airlines regarding their level of overall satisfaction with the airline. The responses were aggregated so that a single score in the table represents the sum of satisfaction scores of all surveyed passengers of a single flight. The highest possible score is 100, reflecting perfect satisfaction. Omega thinks that probably the mean satisfaction scores are not the same for the 4 airlines. a. State the null hypothesis and alternative hypothesis. b. Find the mean for each airline's satisfaction score, and find (overall mean of all scores) Applying the F distribution at the 95% confidence level (0.05 significance), create an ANOVA table that shows the computed value of F and critical F (F crit) for the model- Highlight the F and F crit, as well as the p-value. Write 1-2 sentences interpreting the p-value and the results. C. HINT: Use the Data Analysis tool in Excel for ANOVA: Single Factor' to build your ANOVA table... it's single factor because you are comparing 4 treatments (4 airlines) on a single factor of Overall Satisfaction.Explanation / Answer
a)
Ho : Mean of all airlines satisfaction level is same
Vs
H1 : Mean of At lest one airline satisfaction level is different
Using Minitab
C)
One-way ANOVA: V-west, JJA, All-Ways, Yolo
Method
Null hypothesis All means are equal
Alternative hypothesis At least one mean is different
Significance level ? = 0.05
Equal variances were assumed for the analysis.
Factor Information
Factor Levels Values
Factor 4 V-west, JJA, All-Ways, Yolo
Analysis of Variance
Source DF Adj SS Adj MS F-Value P-Value
Factor 3 538.1 179.35 5.58 0.005
Error 25 803.2 32.13
Total 28 1341.3
Model Summary
S R-sq R-sq(adj) R-sq(pred)
5.66833 40.11% 32.93% 18.07%
Conclusion : Here P-value is 0.005 which less than level of significance 0.05 so we Reject Ho.
That means Mean of At least one airline satisfaction level is different
b)
Means
Factor N Mean StDev 95% CI
V-west 7 82.00 7.05 (77.59, 86.41)
JJA 6 77.50 7.06 (72.73, 82.27)
All-Ways 8 74.38 4.50 (70.25, 78.50)
Yolo 8 70.38 4.03 (66.25, 74.50)
Pooled StDev = 5.66833
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.