A Lab Technician Is Tested for Her Consistency by Making

question 28

Multiple Choice

A lab technician is tested for her consistency by making multiple measurements of the cholesterol level in one blood sample. The target precision is a standard deviation of 1.4 mg/dL or less. If 16 measurements are taken and the standard deviation is 2.1 mg/dL, is there enough evidence to support the claim that her standard deviation is greater than the target, at = .01?

• A) Yes, since the χ² test value 33.750 is greater than the critical value 32.000.
• B) No, since the χ² test value 22.50 is less than the critical value 30.578.
• C) Yes, since the χ² test value 33.750 is greater than the critical value 30.578.
• D) No, since the χ² test value 22.50 is less than the critical value 32.000.

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Definitions:

Blood Vessels Permeability

A measure of how easily substances can pass through the wall of blood vessels from the bloodstream to the tissues.

Edema

Refers to the swelling caused by excess fluid trapped in the body's tissues.

Granulation Tissue

Granulation tissue is new vascular tissue that forms on the surfaces of a wound during the healing process, often appearing as red, granular flesh.

Scar

Fibrous tissue replacing normal tissues; also called cicatrix.