Suppose the Wilcoxon Signed-Rank Test Was Used on Seven Pairs

question 7

Multiple Choice

Suppose the Wilcoxon signed-rank test was used on seven pairs of data. If the calculated test statistic for a two-tailed test was found to be 5, at α = 0.05 we can conclude that

• A) the null hypothesis should not be rejected and there is no evidence that the median of the differences differs from zero.
• B) the null hypothesis should be rejected and that the groups are not all the same.
• C) the alternative hypothesis should not be rejected and the median of the differences is not zero.
• D) as T = 5 > Tcr = 2, we support the alternative hypothesis.
• E) the groups are different, as T = 5 > Tcr = 2.

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Definitions:

Ball and Socket

A type of synovial joint that allows for movement in almost any direction, found in the shoulder and hip.

Ellipsoidal

Shaped like an ellipse, often referring to an ellipsoidal joint in the body that allows movement in two planes.

Saddle

In anatomy, refers to a saddle-shaped joint that allows movement in several planes, such as the thumb joint.

Posterior Thigh

The back part of the thigh, consisting of muscles like the hamstrings that are involved in extending the hip and flexing the knee.