Hypothesis Testing
A sample of 10 international telephone calls provided the Sprint and WorldCom calling rates per minute for calls from the United States (World Traveler, July 2000)
|
Country |
Sprint |
WorldCom |
|
Australia |
0.46 |
0.26 |
|
Belgium |
0.69 |
0.4 |
|
Brazil |
0.92 |
0.53 |
|
Colombia |
0.55 |
0.53 |
|
Denmark |
0.5 |
0.26 |
|
France |
0.46 |
0.26 |
|
Germany |
0.46 |
0.26 |
|
Hong Kong |
0.92 |
0.4 |
|
Japan |
0.69 |
0.4 |
|
United Kingdom |
0.46 |
0.26 |
Provide a 95% confidence interval estimate of the difference between the two population means.
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