A Hotel Tracks the Number of Complaints Per Month

question 9

Multiple Choice

A hotel tracks the number of complaints per month. When the process is in control, there is an average of 35 complaints per month. Assume that a 2-sigma control limit is used. What is the upper control limit?

• A) less than or equal to 35
• B) more than 35 but less than or equal to 45
• C) more than 45 but less than or equal to 55
• D) more than 55

---

Definitions:

Equation

A statement that asserts the equality of two mathematical expressions, often containing one or more variables.

Vertices

The plural of vertex, meaning the corners or points where lines meet in a geometric shape.

Co-vertices

The endpoints of the minor axis of an ellipse, considered less significant than the primary vertices.

Vertex

The highest or lowest point of a parabola, representing the maximum or minimum value of a quadratic function.