Question

Kuya is relocating to China to manage a local branch of world news broadcasting station. He...

Kuya is relocating to China to manage a local branch of world news broadcasting station. He needs to decide on which mobile phone providers he should select based on a sample data of monthly charges from various subscribers. He came to you with the data to determine the provider with the lowest charges, on the average. Which provider would you advise Kuya to select?

Mobile Unicom Telecom
62 60 62
55 71 58
69 64 68
58 65 57
56 67 63
63 64 57
63 71 69
63 72 68
64 65 67
64 64 69
64 65 68
64 70 60
57 71 63
61 64 69
59 68 69
57 67 66
57 72 62
53 71 66
51 64 67
62 68 62
59 72 60
71 65 59
59 73 57
58 72 59
68 73 65

The appropriate test for this problem is:

one-way ANOVA
repeated measurements

The obtained statistic is:

F = 17.7
F = 1.77
F = 7,71
F = .177

The associated p value is:

< .05
< .01
< .001
< .0001

Decision is:

reject the null
retain the null

Conclusion is:

1)go with Mobile
2)go with Unicom
3)a toss up between Mobile and Unicom
4)no conclusion can be drawn

Homework Answers

Answer #1

applying one way ANOVA on above data:

Groups Count Sum Average Variance
Mobile 25 1517 60.68 23.47667
Unicom 25 1698 67.92 13.99333
Telecom 25 1590 63.6 18.75
ANOVA
Source of Variation SS df MS F P-value
Between Groups 663.39 2.00 331.69 17.70 0.0000
Within Groups 1349.28 72.00 18.74
Total 2012.67 74.00

The appropriate test for this problem is- one-way ANOVA

The obtained statistic is: F = 17.7

The associated p value is: < .0001

Decision is: reject the null

Conclusion is: 1)go with Mobile

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