An Internet service provider is interested in testing to see if there is a difference in the
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Question:
An Internet service provider is interested in testing to see if there is a difference in the mean weekly connect time for users who come into the service through a dial-up line, DSL, or cable Internet. To test this, the ISP has selected random samples from each category of user and recorded the connect time during a week period. The following data were collected:
Dial Up | DSL | Cable |
19.2 | 40.6 | 39.5 |
17.7 | 40 | 42.3 |
17.2 | 41.5 | 47 |
18.9 | 30.5 | 45.4 |
26.9 | 46.8 | 41.1 |
22.6 | 43.2 | |
31.2 | 39.9 | |
41.9 | ||
49.3 |
Based upon these data and a significance level of 0.05, which of the following statements is true?
The F-critical value for the test is 3.555 |
The test statistic is approximately 43.9 |
The null hypothesis should be rejected and conclude that the mean connect times for the three user categories are not all equal. |
All of the above are true. |
Related Book For
Auditing and Assurance Services
ISBN: 978-0077862343
6th edition
Authors: Timothy Louwers, Robert Ramsay, David Sinason, Jerry Straws
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