Suppose the Kruskal-Wallis Test Was Used to Compare Four Groups

question 16

Multiple Choice

Suppose the Kruskal-Wallis test was used to compare four groups. If the test statistic value was found to be 9.545, using α = 0.05 we should

• A) reject the null hypothesis
• B) not reject the null hypothesis
• C) conclude that the groups are all the same
• D) reject the null hypothesis and conclude that the groups are not all the same
• E) not reject the null hypothesis and conclude that the groups are all the same

---

Definitions:

Process Characteristic

A feature or attribute that can be measured or quantified to assess the performance of a process.

Normal Distribution

A type of continuous probability distribution for a real-valued random variable, symmetrical and described by its mean and standard deviation.

Capability Index

A statistical measure that quantifies the ability of a process to produce output within specified limits.

Compressive Strength

The capacity of a material or structure to withstand loads that reduce the size, expressed typically in pounds per square inch (psi) or mega pascals (MPa).