The LEAST preferable and reliable method of selecting people to participate in a research study is:

A) random sampling.
B) systematic sampling.
C) convenience sampling.
D) alternative time sampling.


Answer: C) convenience sampling.

Health Professions

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How many grams of zinc oxide are contained in 60 gm of Zinc Oxide 40% paste?

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Sheltering of patients from radiation can be accomplished with:

A) Distance B) 4 inches of earth C) 10 inches of wood D) Iodine

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Which of the following mean mass aerodynamic diameter (MMAD) aerosol suspensions is pro-duced by an ultrasonic nebulizer operated at 1.25 MHz?

a. 1 to 2 µm b. 6 to 10 µm c. 4 to 6 µm d. Less than 1 µm

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Patients with cleft palates may have difficulty sucking, swallowing, or forming sounds

a. True b. False Indicate whether the statement is true or false

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