Use the Following to Answer the Question(s) Below

question 41

Multiple Choice

Use the following to answer the question(s) below.
Three brands of AAA batteries are compared to determine if differences in lifetime exist. Each brand is tested in four devices (TV remote, hand-held game, flashlight and digital camera) . The experiment is run once for each combination of brand and device. The twelve runs are ordered randomly. The time (in minutes) that each battery lasts under continuous usage is recorded. The partial ANOVA results are as follows:
-Which of the following statements is true about this design?

• A) This is a completely randomized design in one factor.
• B) The devices serve as blocks to account for the variability between the lengths of time batteries last in different devices.
• C) We know that the interaction effect between brand of battery and type of device is significant.
• D) This is no treatment in study.
• E) This is a retrospective study.

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Definitions:

Papulopustular

Relating to a type of acne characterized by the presence of both papules (small, raised bumps) and pustules (pus-filled lesions) on the skin.

Erythema

Reddening of the skin, commonly associated with irritation, injury, or infection.

Epidermis

The outermost layer of cells in the skin, acting as the body's primary barrier against the environment.

Mucous Membranes

The moist tissue lining body cavities and passages that are in contact with the external environment, including the mouth, nose, and digestive tract.