A Plot Below the Lower Control Limit on the Range

question 98

Multiple Choice

A plot below the lower control limit on the range chart
(I) should be ignored since lower variation is desirable.(II) may be an indication that process variation has decreased.(III) should be investigated for assignable cause.

• A)I and II
• B)I and III
• C)II and III
• D)II only
• E)I, II, and III

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Definitions:

Positively Charged

Having more protons than electrons, resulting in a net positive electric charge.

Negatively Charged

Refers to atoms or molecules that have gained one or more electrons, resulting in a net negative charge.

Molecule

The smallest physical unit of an element or compound, consisting of one or more atoms held together by chemical forces.

Ion

A molecule or atom that has acquired an overall electric charge from either losing or gaining electrons.