In a Study of Low Tar Cigarettes, Five Cigarettes from Each

question 85

Multiple Choice

In a study of low tar cigarettes, five cigarettes from each of three brands were tested to see if the mean amount of tar per cigarette differs among the brands. i. There are 2 degrees of freedom for the numerator.
ii. There are 14 degrees of freedom for the denominator.
iii. If the sum of squares for the brands is 0.07, the mean square for brands is 0.035.

• A) (i), (ii), and (iii) are all correct statements.
• B) (i) and (ii) are correct statements but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) (i), (ii), and (iii) are all false statements.

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Definitions:

Collagen

The main structural protein found in skin and other connective tissues, widely used in purified form for cosmetic surgical treatments.

Decubitus

A medical term referring to a body position in which the patient lies down. It also pertains to pressure sores that can develop from prolonged bedrest.

Bedsore

A sore that develops on the body due to prolonged pressure from lying in one position.

Alopecia

A condition causing hair loss from some or all areas of the body, typically the scalp.