Peter Noticed That the Nearest Cafe, Where He Had Previously

question 10

Multiple Choice

Peter noticed that the nearest cafe, where he had previously been often, changed the signboard. He decided to find out how this place has changed using a rating from five popular sites. He took the rating of this place under the previous name and now and, after that, he conducted a signed-rank test. The result of this study is a signed-rank sum equal to 11. What can he say about a change in the rating of this place? Use α = 0.10.

• A) The test-statistic is 13, the critical value is 11. Therefore, he cannot reject the null hypothesis and conclude that the rating has remained unchanged.
• B) The test-statistic is 11, the critical value is 13. Therefore, he can reject the null hypothesis and conclude that the rating has changed.
• C) The test-statistic is 11, the critical value is 13. Therefore, he cannot reject the null hypothesis and conclude that the rating has remained unchanged.
• D) The test-statistic is 13, the critical value is 11. Therefore, he can reject the null hypothesis and conclude that the rating has changed.

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Definitions:

Forward Pass

A process that identifies all the early start and early finish times.

Backward Pass

A process that identifies all the late start and late finish times.

Critical Path

In project management, the sequence of stages determining the minimum time to complete a project.

Critical Path

The longest sequence of activities in a project plan that must be completed on time for the project to finish by its due date, determining the shortest project duration.