The Use of Carpeting in Hospitals, While Having Aesthetic Value

question 17

Multiple Choice

The use of carpeting in hospitals, while having aesthetic value, raises an obvious question: Are carpeted floors sanitary? An experiment comparing airborne bacteria levels in carpeted rooms with that in uncarpeted rooms was performed in an effort to answer this question. Specifically, for each of eight carpeted rooms and eight uncarpeted rooms in a hospital, the number of bacteria per cubic foot of air was measured. The data are given below. Assume that room sizes are equal, and that the 16 rooms in this experiment were assigned randomly to the carpet and no-carpet groups. If W, the Wilcoxon rank sum test statistic, is the sum of the ranks assigned to the carpeted group, and if the two populations have the same continuous distribution, then the standard deviation of W is:

• A)2.32.
• B)8.51.
• C)9.52.
• D)90.67.

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Definitions:

Responsible

Being responsible for performing certain actions or overseeing or looking after someone as a requirement of one's position or duty.

Blur

A lack of clarity or distinctness in an image, scenario, or situation, leading to confusion or ambiguity.

Intangibles

Non-physical assets that cannot be seen, touched, or physically measured, such as intellectual property, brand names, and customer loyalty.

Accelerating Rate

Refers to the increase in speed or amount of a particular process or phenomenon over time.