A Two-Tailed Test Is One Where

question 57

Multiple Choice

A two-tailed test is one where:

• A) results in only one direction can lead to rejection of the null hypothesis
• B) negative sample means lead to rejection of the null hypothesis
• C) results in either of two directions can lead to rejection of the null hypothesis
• D) no results lead to the rejection of the null hypothesis

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Definitions:

Mann-Whitney U

A nonparametric test used to compare differences between two independent samples.

Wilcoxon Rank Test

A non-parametric statistical test used to compare two related samples to determine if their population means ranks differ.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution without violating any constraints.

Obtained Value

The actual measured or computed value from a statistical analysis or experiment.