The Quality Control Manager of a Major Cell Phone Provider

question 14

Multiple Choice

The quality control manager of a major cell phone provider is concerned about the life of the cell phone batteries they use. He took a sample of 13 batteries from a recent shipment and used them continuously until they failed to work. The manager measured the number of hours the batteries lasted and found the mean to be 550.4 with a standard deviation of 315.3.
-The appropriate test statistic to test the hypotheses is _____.

• A)6.20
• B)1.72
• C)0.477
• D)-6.20
• E)-1.72

---

Definitions:

Combo Box

A user interface control that combines a drop-down list or list box and a single-line textbox, allowing the user to select an item from the list or to enter a new value.

Form Layout Tools

Software features or tools that allow for the customization and arrangement of fields and controls in a form.

Arrange Tab

A feature in software applications, particularly in graphical or document editing programs, for organizing and aligning elements.

Tabular

Pertains to data or information presented in rows and columns, resembling a table.