A Tool Manufacturer Tests Three Types of Cutters Used in a Lathe

question 13

Multiple Choice

A tool manufacturer tests three types of cutters used in a lathe operation. One type is a laminated steel cutter made of very hard high-carbon steel sandwiched between two softer steels. Another is a special high-speed steel cutter developed using powder metallurgy. The final one is made from cryogenically treated steel. Cutters of each type are tested to see how long they will last (in hours) in continuous operation until they need to be sharpened. The times are recorded for each cutter used in the study, and the results are given below. The value of the Kruskal-Wallis statistic H for these data is:

• A)2.75.
• B)3.20.
• C)4.76.
• D)5.42.

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Definitions:

State

An organized political community living under a government; often refers to the government itself or to the territory the government controls.

Band Society

A small, kinship-based group of foragers who hunt and gather for their living.

Conflict

A struggle or clash between opposing forces, ideas, interests, or individuals, often resulting in tension or dispute.

Rebellions

Acts of violent or non-violent resistance against established authorities or governments, typically in an effort to enact change.